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malc999
29th May 2007, 05:11
hi people i have my mates zxr400 but it wont start i put new engine in but it trying to start but just backfires an flames out the exhaust any ideas thx

NighthawkNZ
29th May 2007, 07:42
hi people i have my mates zxr400 but it wont start i put new engine in but it trying to start but just backfires an flames out the exhaust any ideas thx

check leads are in the right way round, timing etc (and have new battery on stand by) how old is the fuel..? how long has the new engine been sitting...???

WRT
29th May 2007, 09:14
Does sound like you might have the leads on the wrong spark plugs. Check the firing order.

Squiggles
29th May 2007, 20:08
yer, sounds similar to what me and the old man did on his cx500... deafened me when i started pushing him down the hill to bang start her :shit:

malc999
31st May 2007, 07:16
i got it running but turn it off then it wont start again just trying to start back to the same

avgas
31st May 2007, 07:34
I had similar on the ZX4R when the battery terminal broke off.
Check leads though. Along with Water in tank, water in carbs, dodgey cams etc.