View Full Version : engine problem NEED HELP!!!

04-24-2006, 12:33 PM
fitted new crank shaft i have put the engine back into the bike and started it up but it will not rev over say 4000rpm any one got any suggestions no matter how daft. cheers

04-24-2006, 12:43 PM
check for rats who are using a lighter in place of the spark plug and messing up the timing??

:kidding: lol

but what does it feel like over 4000?? is it boggin down or what?

04-24-2006, 12:48 PM
bike bearly runs at all

04-24-2006, 12:49 PM
lol nope its a spark plug all rite

04-24-2006, 04:00 PM

Did you line the crankshaft out as i said there?

matty moo
04-25-2006, 05:41 AM
mav you changed the jets cus mine was being over fuled and it would only rev to 4000rpm sory if its no good at all

04-25-2006, 12:59 PM
my 70cc kit was runing fine before i changed my crankshaft so my jet should be ok cheers any way

also my crankshaft moves pretty easy

04-25-2006, 02:20 PM
oilseals? fitted a ring in the wrong place? did you fit all 3 of the crankshafts oilseals? seen a lot of times people forgot the tiny one on the inside on the clutch side.

04-30-2006, 04:22 AM
cheers for your help i got it sorted now timing was out cheers any ways

04-30-2006, 07:22 AM
cheers for your help i got it sorted now timing was out cheers any ways

Dont you guys mark the ignition ground plate before removing it?
And in anycase wen you put it back you can see were the screws originaly were because of the warks they left.