Hey What's up guyguys my names martin I'm from orange county california 21 years old I own a 94 yamaha blaster with a 240 big bore kit fmf fatty exhaust and couple of other mods I'm here because I'm in need of some help!!
Newbie for the OC!!
- Thread starter Efmartin91
- Start date
Thanks man!
Well my blaster just took a s*** no compression what so ever found rocks inside the piston sleeve and damaged my wiseco piston I used and engine honing tool on the sleeve and cleaned it all up can I just get another 72mm piston or do I have to go with like a 72.25?
Sorry I'm new to this! Lol
Well my blaster just took a s*** no compression what so ever found rocks inside the piston sleeve and damaged my wiseco piston I used and engine honing tool on the sleeve and cleaned it all up can I just get another 72mm piston or do I have to go with like a 72.25?
Sorry I'm new to this! Lol
welcome to BF.
rocks ....WTF ???
are you not running an air filter ??
or were they actually pieces of the piston, ground and pounded into rock looking pieces ?
you can measure bore to piston clearence here...
if within specs, and no scoring of the cylinder, you may get away with a new 74mm piston ?
or seek a local professional opinion.
Last edited by a moderator:
That day I forgot to put them on my friend opened it and said they were rocks
I just took it to yamaha shop around here and the guy said yes its a 72mm piston but because it overheated ima have to bore it out 72.25 or 72.50
Plug chop.
Before you make the plug chop run it is important that the float level is correct, the idle is set correctly and there are no air leaks in the system, otherwise the smoke ring may lie about the AFR.
WHEN ALL OF THE ABOVE ARE CORRECT PROCEED WITH THE FOLLOWING.
Warm up motor to operating temp.
Fit new B8ES plug, ride through the gears and hold WOT in 5th or 6th gear for 10 seconds, or as long as you can safely.
Switch off the motor and pull in the clutch, apply brakes to come to a stop quickly.
Take the plug out and replace the old one for the ride home.
Carefully cut the threaded end off the plug to expose the insulator.
There should be a smoke ring of a cardboard or biscuit colour around the insulator.
If it is non existant or a very light colour, you are lean and require a larger main jet.
If it is a lot darker you are rich and may go down a size in main.
I prefer to run a little on the darker side, I may loose a little power but it is worth it for the peace of mind that I won't need a rebuild so soon.
http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/
http://www.blasterforum.com/engine-13/plug-chop-how-vid-48226/
This is a good to go plug.
This one is a little rich, but I would run it, I like to be on the safe side.
You have to get up a reasonable speed so that you can get the motor to pull strongly.
Then hold it Wide Open Throttle (WOT) for 10 secs or as long as you can.
The idea is not to get speed but to make it pull strong at full throttle to get onto the main jet curcuit.
I find I can safely do it on a short run by applying the brakes some.
If you have not enough room you can use 4th or 5th gear with good results.
Before you make the plug chop run it is important that the float level is correct, the idle is set correctly and there are no air leaks in the system, otherwise the smoke ring may lie about the AFR.
WHEN ALL OF THE ABOVE ARE CORRECT PROCEED WITH THE FOLLOWING.
Warm up motor to operating temp.
Fit new B8ES plug, ride through the gears and hold WOT in 5th or 6th gear for 10 seconds, or as long as you can safely.
Switch off the motor and pull in the clutch, apply brakes to come to a stop quickly.
Take the plug out and replace the old one for the ride home.
Carefully cut the threaded end off the plug to expose the insulator.
There should be a smoke ring of a cardboard or biscuit colour around the insulator.
If it is non existant or a very light colour, you are lean and require a larger main jet.
If it is a lot darker you are rich and may go down a size in main.
I prefer to run a little on the darker side, I may loose a little power but it is worth it for the peace of mind that I won't need a rebuild so soon.
http://www.blasterforum.com/do-yourself-20/how-plug-chop-38674/
http://www.blasterforum.com/engine-13/plug-chop-how-vid-48226/
This is a good to go plug.
This one is a little rich, but I would run it, I like to be on the safe side.
You have to get up a reasonable speed so that you can get the motor to pull strongly.
Then hold it Wide Open Throttle (WOT) for 10 secs or as long as you can.
The idea is not to get speed but to make it pull strong at full throttle to get onto the main jet curcuit.
I find I can safely do it on a short run by applying the brakes some.
If you have not enough room you can use 4th or 5th gear with good results.
