Engine/Crank Balancing - Where can i get it done?

dustDevil · 15th March 2008, 23:18

Where in Pune or Mumbai can I get my Engine Balanced? I've got aftermarket pistons and rods for my RD350. For the new rods to fit, the webs have to be modified and the new Wiseco Pistons weigh lesser than stock (don't have the exact figures). And so I'll have to get my crank dynamically balanced. I would want to go to someone who's been building cranks for so long that 'crank' is his middle name now. It need not be a 2-wheeler guy. Afterall, a crank is a crank.

After reading the RD350 part, I know MOST of you would suggest Ron Chinoy. But I have already dumped the option. Not because he's not good at what he does. But because I'll have to send off the crank to him and I'll miss out on learning from the whole experience.

PS: Delibrately not posted in the motorcycles section.

Mpower · 16th March 2008, 02:59

2 stroke cranks are quite a bit different from 4st because they run on needle bearings.

Does Wiseco recommend that the crank be balanced? If the weight drop is negligible, then it may not be necessary.

dustDevil · 16th March 2008, 10:21

No wiseco did not recommend balancing as such. But the con-rods are actually for the Banshee ATV. These can be used with the RD crank,but with a little modification to the webs. That is why it'll require balancing.
Where can I get it done?

Rehaan · 16th March 2008, 22:43

Quote:

Originally Posted by Mpower

they run on needle bearings.

What is / are the reason(s) for that Mpower?

cya
R

Sankar · 17th March 2008, 09:14

Quote:

Originally Posted by Rehaan

What is / are the reason(s) for that Mpower?

cya
R

If a shell bearing or a bush bearing like in the fourstrokes is being used the crank needs to run in wet sump where it can do with the oil splash lubrication or the big end should be pressure fed; or both. The shell and bush bearings need pretty good lubrication.

This will not work with a two stroke in which the crankcase is sealed and the lube is provided by mixing the 2t in the petrol. So needle bearings are used at the big end and the small end pins. Even crank main bearings are lubricated by 2t oil in the fuel.

dustDevil · 17th March 2008, 19:29

Is there no one who can tell me where to get my crank rebuilt???

Sankar · 17th March 2008, 20:08

There used to be one guy in Chennai who could do dynamic crank re balancing. He's known amongst the performance Bulleteering crowd. Maybe someone from Chennai could help you.

Ford Rocam · 17th March 2008, 20:15

Quote:

Originally Posted by dustDevil

Is there no one who can tell me where to get my crank rebuilt???

You want to rebuild? or just balance ?

dustDevil · 17th March 2008, 21:34

Quote:

Originally Posted by Ford Rocam

You want to rebuild? or just balance ?

I wanna Rebuild, Modify(the webs need a little modification to accomodate the new conrods) and Balance.

ScarySkulls · 18th March 2008, 09:28

Quote:

Originally Posted by dustDevil

After reading the RD350 part, I know MOST of you would suggest Ron Chinoy. But I have already dumped the option. Not because he's not good at what he does. But because I'll have to send off the crank to him and I'll miss out on learning from the whole experience.

I appreciate the desire to learn. Personally, If I was getting Wiseco from my hard earned money, I'd make sure I go for the best guy.

Now that you've already dumped that option, I'll try and enquire from some friends in both Pune and Mumbai

Ford Rocam · 18th March 2008, 12:19

Quote:

Originally Posted by dustDevil

I wanna Rebuild, Modify(the webs need a little modification to accomodate the new conrods) and Balance.

PM me the details may be i can help you out, i had carried out similar job on my car engine.

gt_mustang · 18th March 2008, 15:05

well a tech question here

what do u mean by crank balancing???

Mpower · 19th March 2008, 01:54

Quote:

Originally Posted by Sankar

If a shell bearing or a bush bearing like in the fourstrokes is being used the crank needs to run in wet sump where it can do with the oil splash lubrication or the big end should be pressure fed; or both. The shell and bush bearings need pretty good lubrication.

I think all journal bearings have to be pressure fed with oil. Splash is not good enough.

moralfibre · 19th March 2008, 07:51

Quote:

Originally Posted by dustDevil

Is there no one who can tell me where to get my crank rebuilt???

Aalap, I am free on Friday 21Mar'08. Give me a call and I'll take you to the right places to get the crank balanced. I hope its the original RD crank and not the altered KB crank that is more usually found in RD's?

Sankar · 19th March 2008, 14:18

Quote:

Originally Posted by Mpower

I think all journal bearings have to be pressure fed with oil. Splash is not good enough.

Yes i think you're right.

Small fourstroke engines with needle bearings at the big end can do with splash lubrication.

15th March 2008, 23:18	#1
dustDevil BHPian Join Date: Jun 2006 Location: Surat Posts: 159 Thanked: 16 Times View My Garage	Engine/Crank Balancing - Where can i get it done? Where in Pune or Mumbai can I get my Engine Balanced? I've got aftermarket pistons and rods for my RD350. For the new rods to fit, the webs have to be modified and the new Wiseco Pistons weigh lesser than stock (don't have the exact figures). And so I'll have to get my crank dynamically balanced. I would want to go to someone who's been building cranks for so long that 'crank' is his middle name now. It need not be a 2-wheeler guy. Afterall, a crank is a crank. After reading the RD350 part, I know MOST of you would suggest Ron Chinoy. But I have already dumped the option. Not because he's not good at what he does. But because I'll have to send off the crank to him and I'll miss out on learning from the whole experience. PS: Delibrately not posted in the motorcycles section. Last edited by dustDevil : 15th March 2008 at 23:24.
	() Thanks

16th March 2008, 02:59	#2
Mpower Senior - BHPian Join Date: Mar 2005 Location: Bangalore Posts: 10,409 Thanked: 1,730 Times View My Garage	2 stroke cranks are quite a bit different from 4st because they run on needle bearings. Does Wiseco recommend that the crank be balanced? If the weight drop is negligible, then it may not be necessary.
	() Thanks

16th March 2008, 10:21	#3
dustDevil BHPian Join Date: Jun 2006 Location: Surat Posts: 159 Thanked: 16 Times View My Garage	No wiseco did not recommend balancing as such. But the con-rods are actually for the Banshee ATV. These can be used with the RD crank,but with a little modification to the webs. That is why it'll require balancing. Where can I get it done?
	() Thanks

17th March 2008, 19:29	#6
dustDevil BHPian Join Date: Jun 2006 Location: Surat Posts: 159 Thanked: 16 Times View My Garage	Is there no one who can tell me where to get my crank rebuilt???
	() Thanks

17th March 2008, 20:08	#7
Sankar Senior - BHPian Join Date: May 2005 Location: Location Posts: 5,766 Thanked: 9,054 Times	There used to be one guy in Chennai who could do dynamic crank re balancing. He's known amongst the performance Bulleteering crowd. Maybe someone from Chennai could help you.
	() Thanks

18th March 2008, 15:05	#12
gt_mustang BHPian Join Date: Aug 2007 Location: hyd Posts: 247 Thanked: 5 Times	well a tech question here what do u mean by crank balancing???
	() Thanks