Ticking

[kc8pnd]

Has anyone used 87 or 89 pump gas and noticed ticking sounds in the top end? It started making a ticking sound when you blip the gas it ticks a little then stops as it starts to idle. It has a full tank of 87, and never started doing it until I put that in it.

[Chin_Chilla]

Then most deff. is the gas. Go to the next one up, if it still does it then again move up to 91 octane. Shouldnt have a problem then. If you do, then you could always get some race gas.

[kc8pnd]

Most of the time I run 94. Sometimes 94 CAM2 mix. This is the first time its seen 87, and just wanted to make sure that is a common issue when running a lower grade

[Chin_Chilla]

Yea most likely detonation.

[kc8pnd]

Thanks, I will drain my tank and fill her with 94 and add a new plug.

[katch26]

if you dont have any motor work youre fine with the 87, in fact its whats Polaris recommends. Some other quads require 91 but the pred only has stock 10.5 to 1 and doesnt require anything higher.
STOCKSTOCK

[soonerlightning]

may be a valve rattle or cam chain tensioner

[Villageidiott23]

i believe katch is correct. unless u have motor work done 87 octane should be suffice. try dropping some booster in it and see if the noise goes away. but i would def be wary of the cam chain ticking more. cuz if that goes then u know what happens. by the way katch where you at in laurel i work down that way. any riding areas near you.

[kc8pnd]

The noise is still there even with new gas. But to me it sounds more like a small header leak. It sounds like its more up near the headers, but i can't feel any air hitting my hand when i put it up there. I am going to pull the headers off and check the copper gaskets. I did check the cam chain and it was tight, checked the valves, they were good.

[katch26]

just make sure when you put them on you do equal turns so the crush gasket seats properly. I used some grease, just enough, to hold them in place, itll burn off anyways.

[Villageidiott23]

where you ride at in md???

[katch26]

sent you a pm