Carb and Top-End Questions

[Blaaster]

Back in the spring I had my top-end bored and port job done that favors LOTS of torque. I proceeded to rebuild the top-end and break it in. My other mods include a K&N air filter, drilled holes in the air box lid, and an FMF Fatty with the power core II silencer. Not exactly sure what main jet I had in it at the time, but i would guess its not much more than the stock 230. After about ten hours of riding it overheated on me and slowly died...

This caused it too lean!

 

[Kgibson]

o ya forgot ... so a melted piston caused it.... been there done that :/

 

[ebrown002]

well i started to rejet the carb after the rebuild but the sparkplug didnt look bad...it looked pretty good as far as i could tell. how do i keep from making this mistake again? and you can feel the scores with your nails...

 

[Blaaster]

upon your impending rebuild, (just my opinion)
use only factory or cometic gaskets
perform a leakdown test upon reassembly (slickerthanyou sales them)
do the required heat cycles, then retorque the head and cylinder base bolts
start with a 300 main jet, and do plug chops to confirm lean or rich jetting for your particular mods and regional elevation

your leaking fuel may be cured by a float adjustment ????
i like the "moose" rebuild kits, < but will only include a stock 230 main jet

heres some excellent reading to avoid repeat offenses.................

http://www.blasterforum.com/do-yourself-20/videos-how-perform-air-leakdown-test-31464/

http://www.blasterforum.com/do-yourself-20/build-use-leakdown-tester-10663/

http://www.blasterforum.com/engine-...t-done-after-top-end-rebuild-4399/index3.html

http://www.blasterforum.com/engine-...ything-you-need-know-most-useful-posts-28478/

http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/

Awk already covered how to stop this happening again..

Take the jug to your repairer and let him be the judge as to wether you need a bore and piston.