I just got an 85 tri- z. It can only get it to run with starting fluid. It is getting gas but will not stay running any suggestions on what I should do?

 

It sounds like it has a dirty carb take the carb off and disassemble it and clean everything jets passages inside outside everything

 

Yeah definately clean the carb, just take the carb loose and turn it sideways enough to get the bottom bowl off (4 screws). Then take the brass jets out and make sure you can see thru them, then clean the bowl and you should be all set.

 

The jets are clean. Bowl is clean. I'm wondering about the fuel pump. How much fuel should come out of the hose when you kick it? It only seems to trickle, is that normal? I'm not used to bikes with fuel pumps.

 

the fuel pump should squirt gas out about 2 feet. sounds like you are going to need to rebuild your fuel pump. If you keep use the starting fluid you will need to rebuild your motor. Starting fluid burns hot and dry that motor needs oil.

Dan

 

Can someone tell me what the compression should be on a two stroke 1985 yamaha 250? And how many kicks to reach that compression?thanks

 

If I remember right, 120 is good. I think it could be as low as 90 and as high as 150. Should get there on at least the 2nd kick.

 

Thanks Raptor450! I took off top end and taking it to the shop. Had 60 on the first kick. Hopefully that's the problem. Has fuel has spark but won't run.