Posts
44
Joined
1/15/2021
Location
GB
Hello all,
I've got a 2018 RMZ450. It's on about 55hrs with a top and bottom engine rebuild at 30hr.
Cold it starts great and runs great when warm. However after the bike has warmed up it's nearly impossible to start again, I always eventually get it going without a bump start but we are talking 20-30 kicks.
Does anyone know the specs for the valve clearances?
I can't find a service manual for this age RMZ anywhere at all. Ideally id like to do a compression test but without the manual I can't find the figures.
Or does anyone else have any other tips?
Possibly the coolant temp sensor etc causing it to run to rich when starting hot?
As I say when it get's going it runs brilliantly.
Cheers
I've got a 2018 RMZ450. It's on about 55hrs with a top and bottom engine rebuild at 30hr.
Cold it starts great and runs great when warm. However after the bike has warmed up it's nearly impossible to start again, I always eventually get it going without a bump start but we are talking 20-30 kicks.
Does anyone know the specs for the valve clearances?
I can't find a service manual for this age RMZ anywhere at all. Ideally id like to do a compression test but without the manual I can't find the figures.
Or does anyone else have any other tips?
Possibly the coolant temp sensor etc causing it to run to rich when starting hot?
As I say when it get's going it runs brilliantly.
Cheers
I have a 20 RMZ, my valves went at around 60 hours and would be hard to start cold. I would sometimes have to use the choke to get it started once it was warm.
Mine seems to start fine cold though. Strange
I'm a pretty big guy. And although I've never found a bike hard to kick I have to say when warm it did feel especially easy.
The Shop
Tore into the bike.
Exhaust valves are in spec but only just. 0.15 and 0.17
Intake valves are one in just and one way out. 0.11 and the other is less than 0.05 as that's the smallest gauge I have.
Good news is the shims installed still have some meat to them at 2.7/2.75 exhaust and 2.3/2.35 intake.
I've ordered some shims to hopefully take me to the upper end of clearances.
U ever find the problem I have a 22 doing same thing
Having same problem with my 22 rmz 450 with only 37hrs on it
Have you checked valve clearance yet?
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