possible air leak?

[blasterbuddy200]

i have no idea when it comes to air leaks, what they are, or what they sound like or do to an engine.. but looking at all the air leak threads on here i think its possible i might have one. when in gear and i apply the throttle it makes the normal blaster knocking noise but tends to make a loud knock that you can hear over the engine.. if its not an air leak what could be the problem??:-/

 

[Surfrjag]

detonation or a bad crankbearing. can you make us a video... of you blaster

 

[blasterbuddy200]

i could but you prolly cant hear it in the video, you can barely hear it over the motor its self, hard to explain but i just noticed it while riding a few minutes ago

 

[wheresthericego]

Did you rejet for winter? It has to be almost 0° up there now?
To answer your question about air leaks you would need to get a air leak tester. Holshotman sells em cheapo and the shipping was super fast!

 

[blasterbuddy200]

no i didnt and it seems to be jetted fine for this weather, i ran it in -10 last week and ran great, and its 32 today so shouldnt be to bad

 

[Surfrjag]

just because its running good doesnt mean its jetted right... lean is mean and also makes heat and go boom

 

[NEONNIGHT34609]

does anyone have a video of a blaster with a bad air leak

 

[blasterbuddy200]

well, iv had it since november so iv never had it without snow on the ground... but i do seem to smell a strong burning smell when im not moving and its idling, idk if its just the exhaust or something else

 

[Awk08]

the only noise you will hear from an airleak is your piston seizing to the cylinder, and that won't be a knocking sound, that would only be bearings or piston slap
check your compression and report back

 

[blasterbuddy200]

whats the compression supposed to be for a blaster??

 

[scotj77]

air leaks come in all different shapes and sizes so it's hard to say "here is a video of my quad with an airleak".

 

[Awk08]

airleaks can be at the base or head gasket, both crank seals, the case halves and anywhere around the intake/reeds
a leakdown tester is the best way to find them

120psi for a stock blaster, anywhere near 100psi will need attention soon, and under 100 is past time for a rebuild

 

[blasterbuddy200]

alright thanks for the info, ill go and find a compression tester and report back

 

[blasterbuddy200]

at 3 kicks its at 100.. that good or bad?

 

[scotj77]

kick it til it stops goin up

 

[blasterbuddy200]

damn it, ok ill have to do it tomarrow

 

[darederek]

ya hold throttle wide open and kick till the gauge doesnt go up anymore

 

[99LRDblaster]

ya hold throttle wide open and kick till the gauge doesnt go up anymore

Just to reinforce this.......many people forget to do this.

 

[blasterbuddy200]

ah, thats something i didnt do haha