Raptor 660 slipping

[wrwiii12]

have a raptor 660 that is doing something a little weird. If i just go along slow it is fine but once I put some pep in it the thing seems to skip every 4 seconds. At first I thought the chain was slipping but I can not see any wear or visually see it slipping. When it does it there is a loud clicking/clanking going on. The weird thing about it is that it does get up and go and will accelarate even while doing this. Any suggestions?

[01 RAPPY 660]

is it going into gear all the way?

[wrwiii12]

It seems to be. I by far not a mechanic but I am mechanically inclined. I can go and shift through all the gears and pick up some major speed. It seems to do it in every gear. I am pretty sure it is in gear fully but do not know the correct way to verify besides knowing it has pep and goes with lots of torque.

[powermaddd400ex]

valves maybe

[01 RAPPY 660]

well from what u are telling me sounds like u are running a tight chain this will cause it to pop and crack sound when it's under a load.

[wrwiii12]

Thats what I thought so I loosened it up. I do know I have an issue with the rear end because the axle has about 1/4 to 1/2 inches of play in the housing. Another hint that might help is sometime when I stall it out (not that I would ever do that on purpose hahaahha) when the engine stops I hear something like a hammer slam the engine.

[01 RAPPY 660]

as far as the rear end sounds like u need new carrier bearings. and my friend has a yfz 450 and his ele. start gear kicks when he stalls it out so it just might be that.

[wrwiii12]

ok that might explain the kicking when stalling. But when I am giving it some gas and really putting the pedal to the metal the slipping/slapping sound must be a major issue. You think needing a carrier bearing could cause this?

[Stoopidbot1]

I would take it to the dealer before you just start replacing parts. That can get expensive especially if you don't get it first shot.

[wrwiii12]

I dont know why I am even telling the truth about what the problem was because it was so obvious and I didn't think to check it. After beating the hell out of it on the track i found that my front sprocket was worn down. I knew it sounded like the chain slipping. Thanks for everyones input.