New to the Forum Blasty wont fire.

[JabsBlaster88]

Hi guys i am just at a dead end here.

Blaster was running great took it out on a trail run got about 3 miles from the car when it just started bogging out to crap, took a look and the manifold had a huge rip in the side of it. ( don't have the manifold anymore so no pic avail ) So i just putted back to the car roughly 3 miles.

Got back got the new manifold and new reeds installed ran for a few seconds then just fell on its face.

Opened it up sure enough rings are gone, Replaced rings got everything back together, put new gas in ( 32:1 ) new plug .30 gap , started up idle better than ever, ran through break in process just to be safe, on the 3rd break in cycle i start it and the motor revs through the roof, so i killed it.

Which is what now brings me to you, it will not start at all, Kicked or dragged behind a truck.

The big 3 check out 100+ Compression Bright, blue spark, good feed of fuel.

Also cleaned the carb out made sure the jets were cleaned through.

88 Blaster almost almost stock ( 67.50 mm .060 ) with a 34mm keihin carb.

Anything you can tell me or point me to or need from me please don't hesistate.


Thank you in advance

 

[mr_3_0_5]

sounds to me like you are running it lean.. 100 compression is right on the line of working. if you ask me i think you may have baked the rings again. anything over 120 compression is good.

 

[JabsBlaster88]

mr 305 thank for the response, what would you suggest if it did bake the rings again?

new piston all together? take it in to the shop for the work?

Also this is kinda weird when i went to get the rings i was asked to scrape the top of the piston to get the numbers needed.

Now the numbers i got off the top of the piston were ( 57m0675 ) BUT yamaha and our local weisco dealer ( TheWheelmaster.com ) told me it was missing a few numbers and it should be this ( 573m06750 ) but that is not what is stamped on the piston...

little boggled but any help you can give me will be greatly appreciated thanks.

 

[JabsBlaster88]

also since i am running almost 100% stock should i get rid of that 34mm? i'm seeing that the 34 mm isn't the carb of choice unless ported right? ( the 34mm came with the bike i don't know what happend to the stock one )

So go back to the stock? or go for a 28-30mm Keihin? and if so anyone got one for sale?

 

[2strokenitfast]

yea your running it lean keep trying I:I

 

[mr_3_0_5]

what is the compression you only said 100+?

 

[JabsBlaster88]

Mr 305 sorry for the delay man.

I went to check compression again a day ago, kick kick kick... Gauge reads 0... /snicker

SO i ripped the head back off... and
sorry for the blurry cell phone pics

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So i took the head to the shop its being bored now.

Also it is running a FMF fatty and the jet is the 152 you say its lean what size should i jump to i have 3 jets total 148 150 152.

Any suggestion mucho appreciated.

Thanks