Go Back   Team-BHP > BHP India > Motorbikes


Reply
 
Thread Tools Search this Thread
Old 30th December 2011, 16:36   #1
BHPian
 
Join Date: Nov 2010
Location: pune
Posts: 54
Thanked: 30 Times
Default TVS Star- engine reboring advice needed

Hi
My 2005 model TVS star (100cc, 4stroke) has done 45k. I went to mechanic recently since I wanted to increase the mileage that it gives me (currently 45-50kmpl). While tuning the carb, a lot of smoke came out initially, he claimed this is due to defective piston, and that the engine needs to re-bored and piston head to be replaced, and costing about 3.5k for the entire job. (this is what i understood, I couldn't understand him 100%).

The bike is in reasonably good shape, has been driven pretty decently. I got the clutch assembly changed 3 months back. that is the only major work to have been done on it.

Unfortunately, it was with a friend of mine for 3 years, and so I don't know how well it was serviced in that period.

How do I know if engine needs to be re-bored or not? Is re-boring even advisable or should I get some other kind of engine overhauling done. (On another thread it was mentioned that 100cc engines shouldnt be rebored rather the engine kit should be changed.)

Please share your advice with me as I am not well informed in these matters.

thanks in advance
grazd is offline   Reply With Quote
Old 30th December 2011, 21:13   #2
BHPian
 
twistwrist's Avatar
 
Join Date: Mar 2005
Location: bangalore
Posts: 30
Thanked: 20 Times
Default Re: TVS Star- engine reboring advice needed

Quote:
Originally Posted by grazd View Post
Hi
My 2005 model TVS star (100cc, 4stroke) has done 45k. I went to mechanic recently since I wanted to increase the mileage that it gives me (currently 45-50kmpl). While tuning the carb, a lot of smoke came out initially, he claimed this is due to defective piston, and that the engine needs to re-bored and piston head to be replaced, and costing about 3.5k for the entire job. (this is what i understood, I couldn't understand him 100%).

The bike is in reasonably good shape, has been driven pretty decently. I got the clutch assembly changed 3 months back. that is the only major work to have been done on it.

Unfortunately, it was with a friend of mine for 3 years, and so I don't know how well it was serviced in that period.

How do I know if engine needs to be re-bored or not? Is re-boring even advisable or should I get some other kind of engine overhauling done. (On another thread it was mentioned that 100cc engines shouldnt be rebored rather the engine kit should be changed.)

Please share your advice with me as I am not well informed in these matters.

thanks in advance
Hi Grazd,

45k kms is too short for an overhaul. Check the compression of your engine using a compression guage.If the reading is above 145 psi or 10 bar then your seems to be healthy. In case the pressure is low you could also try using new piston rings in the same engine.
Also check the spark plug ,set the gap right according to owners manual. Also get a pollution certificate done, in case of high co and nox readings get the carburator retuned in a Authorised service center.
Check the engine oil regularly , top up if its below the minimum level.
Suggest you to visit another mech and ask his opionion too.
twistwrist is offline   (1) Thanks Reply With Quote
Old 30th December 2011, 21:59   #3
BHPian
 
Join Date: Nov 2010
Location: pune
Posts: 54
Thanked: 30 Times
Default Re: TVS Star- engine reboring advice needed

@twistwrist
Thanks so much! that's very helpful advice indeed. I'll get the checks done and the second opinion tomorrow.

I also noticed some oil on the engine fins (externally). Is this normal in the course of running, or is it a sign of something going wrong?
grazd is offline   Reply With Quote
Old 31st December 2011, 01:23   #4
BHPian
 
twistwrist's Avatar
 
Join Date: Mar 2005
Location: bangalore
Posts: 30
Thanked: 20 Times
Default Re: TVS Star- engine reboring advice needed

Quote:
Originally Posted by grazd View Post
@twistwrist
Thanks so much! that's very helpful advice indeed. I'll get the checks done and the second opinion tomorrow.

I also noticed some oil on the engine fins (externally). Is this normal in the course of running, or is it a sign of something going wrong?
Hi Grazd,

Oil between the cylinder and head gasket / bottom engine could be because of the clearance in the gasket. you could also use gasket maker glue or anabond while re assembling with newer gasket. If the oil spills out regularly better to get a new gasket in place.If oil is dried up with dust then just leave it as it is.
twistwrist is offline   (1) Thanks Reply With Quote
Old 31st December 2011, 06:17   #5
BHPian
 
Join Date: Nov 2010
Location: pune
Posts: 54
Thanked: 30 Times
Default Re: TVS Star- engine reboring advice needed

Thanks again for taking the time to help out. I'll get this checked out keeping your advice in mind.
grazd is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
TVS Jive - The Auto Clutch Bike from TVS five46 Motorbikes 74 19th September 2016 21:23
SCOOP! New TVS Scooter spotted testing. Update: TVS Jupiter Launched Redline6800 Motorbikes 32 18th May 2015 21:54
Hero Honda Splendor problems after reboring shome13 Motorbikes 44 1st December 2009 11:23
Need more info on Post-Reboring Maintenance on a Fiero four_tire Technical Stuff 9 4th March 2008 13:11


All times are GMT +5.5. The time now is 12:19.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks