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Old 5th September 2013, 20:44   #31
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Default Re: Re Sleeving the cylinder of a 2 Stroke Engine

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Successfully installed a new sleeve on the current bore. Slightly polished the ports too. The work done is really fab and i must say the precision he was carrying out on the job was immaculate. The bike is in rebuild stage and i will keep this post updated with the status of riding a sleeved bore.

How has been the performance , any heating issues.

Also members- there are a lot of US based companies who sell sleeves, is it possible to order a sleeve with pre cut ports? Asking this as I am eying a Shogun and cylinders are next to impossible to source.

MP
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Old 8th November 2013, 11:44   #32
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Default Re: Re Sleeving the cylinder of a 2 Stroke Engine

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The bike is in rebuild stage and i will keep this post updated with the status of riding a sleeved bore.
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I just want to enjoy the 2 stroke experience @ affordable cost. The sleeving hardly costs 1k and it sure is an option for collectors. Untill new barrels arrive from the factory !!
Just bumping up this thread, The Great, as there were no updates.

Can you share your experience, as the job should have been completed and must have ridden the bike also after that?
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Old 9th November 2013, 13:23   #33
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Default Re: Re Sleeving the cylinder of a 2 Stroke Engine

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How has been the performance , any heating issues.

Also members- there are a lot of US based companies who sell sleeves, is it possible to order a sleeve with pre cut ports? Asking this as I am eying a Shogun and cylinders are next to impossible to source.

MP
The performance is great, highly suited to my style of riding (occasional bursts of rush riding, mostly smooth and silky riding to enjoy the grunt of a 2 stroke, and knowing that I can put most of the production 4 strokes to shame anytime.)

The compression is great and till date I haven't experienced overheating issues. In fact the average has significantly improved too although that wasn't on the list. But to be honest haven't ridden the bike out of the city so cannot be sure of long rides. Max 50 kms in the city per day.

Regarding foreign sleeves I am not sure because I haven't tried it, here in Mumbai we have specialist Rx guy who knows how to prep a 100 or 135 4s and 5s. A specialist of Rx and Bullets you can say. Hence had the trust in his work. Honing, sleeve job, port matching, chamfering, port polishing etc... nothing had to be told he did it all by himself.

As far as shogun goes, be sure that you have the confidence of sourcing original parts, do not get into it just because the bikes can be obtained very cheap in second hand market. Believe me a shogun is much harder to rebuild than an RD . Because of the US market the availability of RD parts are easier to source than a shogun which was mostly produced in asian countries. And a simple item like a manifold can cost you a fortune (almost 20 times the original cost) because of scarcity and rareness of parts.

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Just bumping up this thread, The Great, as there were no updates.

Can you share your experience, as the job should have been completed and must have ridden the bike also after that?
Yes, the bike is running great and there is a significant change in the feel of the engine after 3k kms. Proper run in with lots of care taken surely does make a difference. Every 1000 kms the bike surprises me with the increase in performance. Totally the bike has done about 5k kms till date.

In my opinion a perfect sleeve job is only 25% of the battle won. A deeper understanding of the bike, its true potential, its limitations all have to be studied in order to achieve good results. Other than that reed valve, carb setting, carb jetting , air filter, oil brand and viscosity, electronics, crank shaft, cat con health, Cdi, etc etc.... all have to be studied as per bike to bike and then adjusted accordingly. PS - Original stuff does make a difference overall.

Hooligan performance minded people would not like it as the original company blocks do have an edge over sleeved ones. Also most of the sleeve jobs done are not properly carried out and hence the bad reputation. It does require a specialist.

All in all "I am very happy" and that's what matters the most.
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Old 11th November 2013, 09:10   #34
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Default Re: Re Sleeving the cylinder of a 2 Stroke Engine

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Yes, the bike is running great and there is a significant change in the feel of the engine after 3k kms. Proper run in with lots of care taken surely does make a difference. Every 1000 kms the bike surprises me with the increase in performance. Totally the bike has done about 5k kms till date.

In my opinion a perfect sleeve job is only 25% of the battle won. A deeper understanding of the bike, its true potential, its limitations all have to be studied in order to achieve good results. Other than that reed valve, carb setting, carb jetting , air filter, oil brand and viscosity, electronics, crank shaft, cat con health, Cdi, etc etc.... all have to be studied as per bike to bike and then adjusted accordingly. PS - Original stuff does make a difference overall.
Nice to note that a job well done and the owner enjoyed the job as well as the results. Here is to many more miles of pleasurable riding!


Yes, original parts do make a difference, as the tolerances are finely calibrated.


What was the make of the pistons and piston rings you used? And also the oil (engine as well as 2T)? Did you make any changes in the oil pump, as well as the carb jets for the run in after the re-sleeving?
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Old 11th May 2018, 16:45   #35
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Default Re: Re Sleeving the cylinder of a 2 Stroke Engine

Hello Friends,

I am also stuck with a worn out cylinder of Yezdi Raodking
I have ordered Sleeve from Power Pace Agra honestly i do not know the quality.
But heard the PP quality is not that good.

Can some one help me with Mahesh Powales number or contact person of any good guy who can install a sleeve for my yezdi cylinder in mumbai provided he knows his expertise.

Thanking You,
Ranjit

Last edited by jawabiker : 11th May 2018 at 16:49.
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Old 14th May 2018, 20:55   #36
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Default Re: Re Sleeving the cylinder of a 2 Stroke Engine

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Hello Friends,

I am also stuck with a worn out cylinder of Yezdi Raodking
I have ordered Sleeve from Power Pace Agra honestly i do not know the quality.
But heard the PP quality is not that good.

Can some one help me with Mahesh Powales number or contact person of any good guy who can install a sleeve for my yezdi cylinder in mumbai provided he knows his expertise.

Thanking You,
Ranjit
I trust this guy Mr. Rajesh from Rajesh boring works.

Both my previous bikes (rx 135 5speed and Shogun) cylinders and a friend's Rx 100 cylinder were re-sleeved from him. and I was a totally satisfied customer. I did not have to tell him about the honing, port polishing/ matching, chamfering etc stuff. He is from that era so he knows these bikes well.

Also in my previous CI bullet he had balanced the crank for me so I pretty much can say that he knows what he is doing and he is good at it.

On the phone he wont talk much but once you meet him you will know.

Rajesh - Mobile - 9702207575 / 9892575750

Not sure - but Mahesh Powale and Rajesh are brothers who had started this work together.

Last edited by The Great : 14th May 2018 at 20:58.
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Old 15th May 2018, 21:20   #37
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Default Re: Re Sleeving the cylinder of a 2 Stroke Engine

Thanks a lot, I did happen to.speak with him and will be doing the job with him only.

Regards,
Ranjit
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Old 29th June 2018, 12:25   #38
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Default Help! Yamaha Rx series: All reasons that cause engine failure and seizure.

I was looking for some help with my Rx100 and I believe this thread could help many others. I am new here so please forgive and guide me if this not the appropriate way to seek advise.

My Rx100 is currently running on a standard bore (sleeved) after being bored twice in the past year. And again, there is an unusual sound in the engine with compression loss. As if the piston drags against the cylinder. So this is the third time i am having this issue and here are the details about the work that was done all three times:

I always add 40 ml oil to a liter of petrol as suggested by the mechanic. (shell 2t)
I have not been harsh on the throttle for at least 500 kms once the engine was fixed.
The cylinder bore, new piston, rings and all bearings (crank,connecting rod) were replaced, connecting rod was changed. The crank was checked for any play/out. This was done all three times.
The carburetor is stock mikuni with no changes.

I am really frustrated as I am not able to find the cause and somehow I dont want to give up on this bike. I have had another rx100 in the past that I used really rough but never had issues.

Can you guys please comment all possible reasons that may lead to such engine issues? It would be a treasure of knowledge for me and many others.
Any help/advise will be appreciated.
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Old 29th June 2018, 15:52   #39
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Default Re: Help! Yamaha Rx series: All reasons that cause engine failure and seizure.

Re-sleeving isn't an easy job, which I am sure you must be aware of. Slack workmanship will lead to poor engine performance.

If all other aspects (piston, rings, crank alignment etc.) are fine, the problem could be with the reed valve (inefficient combustion / exhaust) and / or problem with carb (air/fuel mixture ratio off).

Personally, I think 40ml oil per litre of petrol is on the higher side. For a well run engine it was 20ml and may be 30ml if the engine assembly is new.

There are plenty of posts on RX100 maintenance, including re-boring work done by other members, here :

http://www.team-bhp.com/forum/motorb...ml#post2588888 (Re Sleeving the cylinder of a 2 Stroke Engine)

http://www.team-bhp.com/forum/motorb...ml#post4166151 (Yamaha RX100 restoration - From bits & pieces)

http://www.team-bhp.com/forum/motorb...ml#post1942582 (My Yamaha RX-100 Restoration thread - Need advice)

Last edited by vrprabhu : 29th June 2018 at 15:53. Reason: left out words :-)
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Old 29th June 2018, 16:50   #40
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Default Re: Help! Yamaha Rx series: All reasons that cause engine failure and seizure.

Looks more like the issue with the re-sleeve job. How did you figure out the compression loss?
Safe bet, keep the current bore aside, get a used (non sleeved) bore and give a try.
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Old 29th June 2018, 17:05   #41
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Default Re: Help! Yamaha Rx series: All reasons that cause engine failure and seizure.

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I

My Rx100 is currently running on a standard bore (sleeved) after being bored twice in the past year. And again, there is an unusual sound in the engine with compression loss. As if the piston drags against the cylinder. So this is the third time i am having this issue and here are the details about the work that was done all three times:
Why not use a standard bone-stock Bore (without any Sleeves etc), with standard Piston?
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Old 29th June 2018, 20:50   #42
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Default Re: Help! Yamaha Rx series: All reasons that cause engine failure and seizure.

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I was looking for some help with my Rx100 and I believe this thread could help many others. I am new here so please forgive and guide me if this not the appropriate way to seek advise.
Please get a brand new, standard size engine block and use a standard piston and piston rings to restart with. The new OE spares are still available with Yamaha dealers.

Please get it fitted by an expert mechanic. the one who works on your bike appears a bit confused as he says add40 ml of 2 T oil per litre of petrol and has got the engine rebored two times during the past one year.

Oil pump failure is often a common factor for engine seizure. It happens and the rider is caught unawares many a time. Here, as a precautionary measure we can add an extra 20 ml of 2 T oil to a litre of petrol for safety. The petrol tank rusting can also be checked by such oil addition. The smoke is excessive upon addition of extra 2 T oil. This extra oil also leads to spark plug fouling and carbon deposits near the exhaust port, piston head, engine and silencer muffler which all need to be checked regularly.
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Old 2nd July 2018, 19:06   #43
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Default Re: Help! Yamaha Rx series: All reasons that cause engine failure and seizure.

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Please get a brand new, standard size engine block and use a standard piston and piston rings to restart with. The new OE spares are still available with Yamaha dealers.

Please get it fitted by an expert mechanic. the one who works on your bike appears a bit confused as he says add40 ml of 2 T oil per litre of petrol and has got the engine rebored two times during the past one year.

Oil pump failure is often a common factor for engine seizure. It happens and the rider is caught unawares many a time. Here, as a precautionary measure we can add an extra 20 ml of 2 T oil to a litre of petrol for safety. The petrol tank rusting can also be checked by such oil addition. The smoke is excessive upon addition of extra 2 T oil. This extra oil also leads to spark plug fouling and carbon deposits near the exhaust port, piston head, engine and silencer muffler which all need to be checked regularly.

Thank you for the advise, I have indeed changed my mechanic the last time got the work done. I am now in Pune and will be looking for an expert here.
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Old 2nd July 2018, 19:14   #44
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Default Re: Help! Yamaha Rx series: All reasons that cause engine failure and seizure.

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Originally Posted by anjan_c2007 View Post
Please get a brand new, standard size engine block and use a standard piston and piston rings to restart with. The new OE spares are still available with Yamaha dealers.

Please get it fitted by an expert mechanic. the one who works on your bike appears a bit confused as he says add40 ml of 2 T oil per litre of petrol and has got the engine rebored two times during the past one year.

Oil pump failure is often a common factor for engine seizure. It happens and the rider is caught unawares many a time. Here, as a precautionary measure we can add an extra 20 ml of 2 T oil to a litre of petrol for safety. The petrol tank rusting can also be checked by such oil addition. The smoke is excessive upon addition of extra 2 T oil. This extra oil also leads to spark plug fouling and carbon deposits near the exhaust port, piston head, engine and silencer muffler which all need to be checked regularly.
Thank you. I did think over it and realized that may be the sleeve itself was not set properly. If the sleeve is out of place the piston and the crank assembly will definitely face trouble. In this case as I have mentioned, the issues start around 500 kms after the work is done. This is the range where I ride the bike with extra care. Once I ride it like a Yamaha should perform, it starts showing symptoms of friction in the cylinder.
Will now look for a used/new standard block and piston.

Any help/advise/leads for the same will be highly appreciated.

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Looks more like the issue with the re-sleeve job. How did you figure out the compression loss?
Safe bet, keep the current bore aside, get a used (non sleeved) bore and give a try.
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Old 2nd July 2018, 21:39   #45
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Default Re: Help! Yamaha Rx series: All reasons that cause engine failure and seizure.

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it starts showing symptoms of friction in the cylinder.
Snap of piston / cylinder walls should help for better understanding. Once you open the cylinder again, do post a snap.
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