General questions

[BlasterPat]

Hi guys I am new to the forums just picked up this 2002 yamaha blasty for $800 runs strong as hell shifts good all around I think it was a great deal. Just had a question it has the fmf fatty and where it connects to the exhaust port it looks like there is a free sliding fitting that I noticed a little oil dripping from I know some pipes are just straight pipe idk if it's for flex or what but the spring is good bolts good and the gasket are all ok how can I fix this I'll post a pic when off work idk if it's reducing power , but like I said this thing moves.

 

[Blaaster]

If there is a leak there it could be causing it to run lean.

You should try to stop it leaking, some guys use a little high temp Copper RTV.

As it is a used bike it would pay to leak test the engine to see if the PO has not jetted to mask an air leak.

 

[BlasterPat]

My apologies I forgot to mention I've performed a leak down test but with the tool that goes into the plug hole. It was all good . I guess I don't like the fact that ALL the air is not passing through my xpan chamber, I know that has to cost me some power somewhere? Right. OK looks like I'm gonna get a new exhaust gasket plus the copper rtv and do I put the rtv around the inside or outside of the flange?

 

[blasDa]

I believe you did a compression test. A leak down test is different.

 

[BlasterPat]

I believe you did a compression test. A leak down test is different.

The tool I have is a harbor freight leak down tester. I blocked off the intake manifold and exhaust manifold & screw into the spark plug hole then pump with air.
I realized after reading this forum which is amazing how important a leak down is!

http://m.harborfreight.com/cylinder-leak-down-tester-94190.html

 

[Awk08]

permatex ultra copper spread evenly around outside of flange with a plumbing flux brush, then slide pipe over it and allow to cure at least overnight before running engine

 

[Awk08]

The tool I have is a harbor freight leak down tester. I blocked off the intake manifold and exhaust manifold & screw into the spark plug hole then pump with air.
I realized after reading this forum which is amazing how important a leak down is!

http://m.harborfreight.com/cylinder-leak-down-tester-94190.html

that tester is for auto cylinders, it cannot test the intake gaskets as it pressurizes from inside and forces the reeds closed, keeping the pressure from testing the intake gaskets which are on the outside of the reeds.
the intake/gaskets are the most common source of leaks.
you could just pull the intake and use yamabond or ultra copper rtv to seal the intake, cross your fingers and hope for the best ?....... or use a real 2 stroke leakdown tester which pressurizes thru the intake, as shown above.

torque intake bolts diagonally and incrementally to 5.8 ft. lbs, no more/no less

 

[BlasterPat]

Ok I am definitely buYing a 2 stroke leak down tester from someone on here lol. Or I could just modify the end with pvc or something to go on the intake?

 

[joeak47]

Get Awk's leakdown tester! Money well spent!