Hi,
I am jeroen from Belgium and started my first build some time ago.
I am working on a yamaha SR250 from 1981, i will share some pictures when i get some real work done/result.
currently the frame ect are beeing powdercoated, so time for me to take a look at the engine.
unfortunatly I encounter some problems there and I guess i would need some help.
this is what I have already done:
first compression test showed me 75PSI which is to low i guess.
a leak down test showed me a leaking exaust valve, so i replaced and lapped that one. (I exchaged all cilinder gaskets while the head was off as well)
the compression got up to 125PSI, but the engine still won't start.
I cleaned the carb compleatly and it has the original setup, but the engine still won't start.
I have a spark, i tested that, and when I use startpilot it will run for a few seconds.
what else could it be?
Tomorrow i will try to refresh the cable and plug from the sparkplug because i felt a little shock when i tested the spark (held the sparkplug against the ground)
but besides that i am clueless. so any help is highly appreciated.
Many thanks in advance!
I am jeroen from Belgium and started my first build some time ago.
I am working on a yamaha SR250 from 1981, i will share some pictures when i get some real work done/result.
currently the frame ect are beeing powdercoated, so time for me to take a look at the engine.
unfortunatly I encounter some problems there and I guess i would need some help.
this is what I have already done:
first compression test showed me 75PSI which is to low i guess.
a leak down test showed me a leaking exaust valve, so i replaced and lapped that one. (I exchaged all cilinder gaskets while the head was off as well)
the compression got up to 125PSI, but the engine still won't start.
I cleaned the carb compleatly and it has the original setup, but the engine still won't start.
I have a spark, i tested that, and when I use startpilot it will run for a few seconds.
what else could it be?
Tomorrow i will try to refresh the cable and plug from the sparkplug because i felt a little shock when i tested the spark (held the sparkplug against the ground)
but besides that i am clueless. so any help is highly appreciated.
Many thanks in advance!