Need help

[Str8-6monster]

I bought a blaster the guy befor me only ran gas through it no oil cuz his oil reservoir stoped working and never fixed it when I got it I had it bored over a new piston head new gaskets new coilpack and spark plug it still doesn't run and I can't figure out why if anyone has had this problem please let me know what you did to fix it

 

[Blaaster]

It prolly good that it will not start as I see no mention of replacing any bearings or seals in the crankcase.

There is bound to be damage to the bottom end if it was operated without oil for long enough for the piston to fail.

Is there spark?

Is there fuel?

Are the reeds good?

Have you leak tested the engine?

 

[Str8-6monster]

Spark yes
Fuel yes
Haven't looked at the reeds
Or leak tested

It prolly good that it will not start as I see no mention of replacing any bearings or seals in the crankcase.

There is bound to be damage to the bottom end if it was operated without oil for long enough for the piston to fail.

Is there spark?

Is there fuel?

Are the reeds good?

Have you leak tested the engine?

 

[tbrooks]

^^^ Yep, cases should be split and cleaned and new bearings and seals
Leak test results?
Compression test? Some builders aren't very good at there jobs
What kind of gaskets, hopefully not cheap paper
What kind of coil?
Check your floats and jets

 

[Str8-6monster]

I put it back together wiseco piston and gaskets NGK coil

^^^ Yep, cases should be split and cleaned and new bearings and seals
Leak test results?
Compression test? Some builders aren't very good at there jobs
What kind of gaskets, hopefully not cheap paper
What kind of coil?
Check your floats and jets

 

[tbrooks]

Yes, but are you sure the bore was done properly and matched to your piston

 

[dirtysquared]

You Made mention of the oil resivoir not working. Is the oil injection properly blocked off? Are you mixing your fuel with a 2 stroke oil designed for air cooled engines?

Not probably your problem, but it will help you In the long run.

 

[tbrooks]

I'm not sure about all, but a lot of those pistons come with the cheap paper gaskets

 

[Str8-6monster]

I had a shop do the bore

Yes, but are you sure the bore was done properly and matched to your piston

 

[tbrooks]

I had a shop do the bore

That doesn't mean it was done properly

 

[Str8-6monster]

Yes

I had a shop do the bore

 

[Larry's Shee]

fresh bore/piston your compression should be 120+. If not something isn't right.

 

[Str8-6monster]

Idk if that's what it's at or not never had it tested for compression yet

fresh bore/piston your compression should be 120+. If not something isn't right.

 

[Blaaster]

Before you even think about putting your foot on the kicker to start it.

Leak test it!

 

[bummer981]

I would check the compression. You can usually borrow one from Autozone or Advance Auto, if you leave a deposit. Are you sure you put the new piston in the correct direction?

 

[Blaaster]

Before you leak test make sure the reeds are not damaged and are sealing correctly.

 

[speedyslyder]

did shop tell you what size piston to buy?
if it was run without 2 stroke oil in gas then im sure it did a job on the crank bearings all of them.did the connecting rod have up n down play at all when you had it taken apart?
make sure pilot jet is clean in carb.
new plug,compression test,clean airfilter,check the reeds,
Is any of the electrical look like it has been touched?Or have you looked at the flywheel and stator?
http://www.blasterforum.com/threads/downloadable-yamaha-blaster-manual.17325/