Reed Issue?

[sr5bidder]

OK, Lets review a few things,

Rich or lean refers to carb jetting not oil ratio.

50:1 oil mix will run richer than 32:1 and is not enough oil for your air cooled Blaster.

Your 32:1 oil mix is not causing your plug fouling. your jetting is.

Cold weather will lean you out. Cold air is denser.

The Yamaha manual says 90 octane or better.

Race fuel has more gravity and usually runs around 1 jet size leaner than good pump gas.

The stock or lightly modded Blaster does not need race fuel.

That said, I would do your top end, check your crank seals and for other air leaks, replace your reeds. Mix up your BellRay at 32:1 with some good 94 octane pump gas and JET for your mods and weather.

mix ratio therory does'nt really sound right at first, but Tim is dead nuts on the money, I've done alot of reading on these things, and suggest if you don't understand how Tim put it... do some reading yourselves

any book by Eric Gorr is good stuff and although old, Gram Bell's performance 2 stoke is good reading as well.

whoa I thought my compression was low at 120psi:-/

 

[Kennedy_Power]

Well $100 at vitos and a hone should get me running great again, especially with the toomey and maybe Vforce in may. cant wait!

You need to have a bore gauge to check out the taper and out of round
If you use a de-glaze hone and install piston/rings. It will not last long if the bore is dead. If you have too much piston clearance, you might crack the intake bridge. I see it all the time
Thanks

 

[Blaster200boy]

You need to have a bore gauge to check out the taper and out of round
If you use a de-glaze hone and install piston/rings. It will not last long if the bore is dead. If you have too much piston clearance, you might crack the intake bridge. I see it all the time
Thanks

I don't quite understand the term "bore is dead". Explain it further with more specifics.

 

[Hawaii]

I don't quite understand the term "bore is dead". Explain it further with more specifics.

he means the bore is no good, cuz it isnt perfectly round. if u have an out of round bore with a perfectly round piston. u will just end up siezing a top- end shortly after installing it. he is suggesting to get your top- end bored and have it measured so it doeesnt have too much piston play, which will also cause a piston to sieze up also. my personal suggestion is to have it bored get the right sized piston run 40:1 mix with 92 or better octane pump gas. and dont be caught up and worried about fouling plugs. i would much rather foul a couple plugs rather than seizing a top- end every summer. o and of course tune your carb accordingly.

*and just a hint this is how i run my bike and it does a great job, except i run my bike with Castor 927 synthetic race oil