ATV Florida Forum

Ok, i got a honda 400ex. My mom bought me a 440 big bore race kit. We got it bored and all that work done. I put it all back together and now it dont want to start. I took it to a place called DC Motorcycle shop. they set timing, done my valves, compression check, valve leak test...they say everything is good on it but its not fireing right. They tried to order a diagnosis thing from honda but they wont sell it. They told me they cant help me anymore. I was wondering if someone on here has had same problem that maybe could help me. I wanted to just buy a new motor but then thats throwing 400$ down the drain. OR maybe i could trade someone for one of there old motors and some cash ill throw in. Ill trade for a stock or what ever you got. or maybe someone can help me. thx

Have you checked your blinker fluid?

make sure your decompression plunger and spring is still in there(sits under the cam) it fell out when i had my top end off the first time and it took forever to figure that out

I'm sure ATP will chime in here shortly, but you say "it won't start" that's very general,,,,is it turning over?  is it trying to fire up at all then falling on it's face?  are you sure it's getting fuel? are you sure it's getting spark?

It also might be worth the drive to ATP in Apopka if it can't get figured out,,,,they do wonders with the Hondas

Id@

yes it fires. everything is there. it just fires on like every 10 strokes. makes like a ka pump noise lol. then just turns over more and does it again. i checked it with a timing gun and the light comes on every 10 secs or so.. i dont kno what could all be wrong. yes its getting gas, i tried it with my friends carb and does the same thing. today im going to try diff electrical parts off his to see whats wrong. any clues?

the timing light should come on alot more often than once every 10 seconds, it should be firing near the end of each compression stroke