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#1 squeezing a little bit more power of a CB250 engine
- Join Date
- Nov 2014
- Location
- Argentina
- Posts
- 3
04-10-2016, 08:42 AMhi, i have a lifan 250-4, been riding it four a couple of years, and now that im gonna re build the engine, i was wondering if you guys have any suggestion for squeezing a little bit more power out of it.
the engine is a 2 parallel cylinders 233cc....its a copy of the honda rebel
for starters, i was thinking on boring it out a litte bit....any other suggestion guys?
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#2 Re: squeezing a little bit more power of a CB250 engine04-10-2016, 11:15 AM
Machinist suggested [GY6 150cc (KBF) /+0.5mm] http://www.chyangwa.net/thread-17478487-1-1.html 13#
Other option: AN150 http://www.chyangwa.net/forum.php?mo...uthorid=295682 11#
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<Ironic epic> Mailed barrel to the machinist above ie. http://item.taobao.com/item.htm?id=21364656584 BUT doesn't check 1st: it's "weird" 14mm pin ...
Re-mail to machinist AGAIN +0.1mm (for Suzi EN125 +0.5mm piston & rings)
Drunk during reassembly (500ml of http://en.wikipedia.org/wiki/Erguotou) ... Apply too much gasket maker, oil path blocked ...
http://translate.google.com/translat...398&edit-text=Last edited by humanbeing; 04-10-2016 at 01:16 PM.
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#3 Re: squeezing a little bit more power of a CB250 engine
- Join Date
- Nov 2014
- Location
- Argentina
- Posts
- 3
04-10-2016, 11:57 PMis that the only choice? i was thinking on putting 2 pistons from the bajaj 135 and leave the bike at 280cc, and just for the sake of longevity, im adding an oil cooler as well, is nothing else to do?
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#4 Re: squeezing a little bit more power of a CB250 engine04-11-2016, 12:54 AM
http://www.shrirampistons.com/pdf/pr...-Catalogul.pdf
DISCOVER 135cc DTS-i 21.3
http://www.mingyang-group.2u.com.tw/...on&%20ring.pdf
CA250 22
Seems OK in theory ... Ask ur machinist for exact answer ...Last edited by humanbeing; 11-05-2016 at 04:54 AM.
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#5 Re: squeezing a little bit more power of a CB250 engine
- Join Date
- Nov 2014
- Location
- Argentina
- Posts
- 3
04-11-2016, 01:01 AMcool, thx for the answer
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