strange noise

[1hellion]

I have a 03 rev 800 w\ new motor and its starting to make a strange noise at steady speed, almost like a fluttering noise, really loud in deep snow.
Any one have an idea?

 

[Frank Swang]

i also have a 03 rev and hearing a strange sounds, i think it is the clutch as it sounds like rubbing or grinding metal. it is the worst at 6000 rpm
what are you hearing?

 

[1hellion]

Mine dont sound like metal its more like a string flapping around its not all the time

 

[dooryder]

maybe a string is pulling out of your belt and you here that flapping around, herd the same thing when i was about to blow a belt on my 06 rev

 

[1hellion]

new belt. Do you think it could be the reeds making that nosie? have boysens in it.

 

[Frank Swang]

does your motor bog or surge?

 

[1hellion]

no it still has all power. between both cly. running about 20 derg. diff

 

[Summiteer]

Is it track noise? Icy buildup riding in deep snow.

 

[1hellion]

Is it track noise? Icy buildup riding in deep snow.

no, it in the end .dept.

 

[POWDERSLUT]

Is it your track racheting ,a real fast loud clickin noise when on the throttle.The reeds wouldn't do anything except flood it ,if they were all chipped,

 

[TrailCrusader]

I had a rattling noise that developed last year and caused me some concern. It started around 6000 RPM and higher. I thought it might have been the belt as a cord was tearing on the edge but it still made noise after changing the belt. I thought about it possible being the clutch.

I found the issue last week. A lower exhaust manifold bolt came loose and fell out. Some other manifold bolts also loosened up and the noise was an exhaust leak at higher RPMs.

 

[POWDERSLUT]

Trailcrusader your sled must have had a noticable power difference then,even a crack in the crotch of the Y pipe and you would notice power loss.

 

[TrailCrusader]

Trailcrusader your sled must have had a noticable power difference then,even a crack in the crotch of the Y pipe and you would notice power loss.

I haven't had it out since tighting up the bolts and cleaning the RAVE valves. It wasn't a large leak but I won't turn down some extra HP.

 

[xxx]

I haven't had it out since tighting up the bolts and cleaning the RAVE valves. It wasn't a large leak but I won't turn down some extra HP.

yes that extra h.p.instead of 140 you now have 140.6

 

[dooryder]

oh no with an exaust leak you can lose ALOT of power, i lost a couple bolts off my 440 once and i couldnt even get close to 7500 rpm at all