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Thread: rebuilt 400 ex wont start

Started 2 months ago by jpojoe
rebuilt 400 ex wont start 03 400 ex new piston,rings {stock bore ring gap miced out}, wrist pins , new tittlewhite valves. cylinder honed crossed hatched, timing perfect, wont start, pops back through intake, new cdi mod, actually in shop right now and shop cant make it run i know it sounds like a timing issue but i know its not PLEASE SOMEONE OFFER ME SOME HELP, was running perfect ...
Site: ATV Riders Source  ATV Riders Source - site profile
Forum: Powertrain  Powertrain - forum profile
Total authors: 3 authors
Total thread posts: 4 posts
Thread activity: no new posts during last week
Domain info for: exriders.com

Other posts in this thread:

John451 replied 2 months ago
my guess would be the cdi or the carb's bein wierd

jpojoe replied 1 month, 4 weeks ago
rebuilt carb replaced cdi mod with a known good one, i cant figure it out

400ex quad race replied 1 month, 2 weeks ago
^^^what he said. if its lost i think you can just take the decompression assembly off you cam. dont really need it anyway.

 

Top contributing authors

Name
Posts
jpojoe
2
user's latest post:
rebuilt 400 ex wont start
Published (2009-10-30 16:31:00)
rebuilt carb replaced cdi mod with a known good one, i cant figure it out
John451
1
user's latest post:
rebuilt 400 ex wont start
Published (2009-10-30 14:43:00)
my guess would be the cdi or the carb's bein wierd
400ex quad race
1
user's latest post:
rebuilt 400 ex wont start
Published (2009-11-14 22:56:00)
^^^what he said. if its lost i think you can just take the decompression assembly off you cam. dont really need it anyway.

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