05 M7 Not revving out, Motor mount??

[Nickster914]

Hello. I have a 2005 M7 That is all stock besides a speedwerx clutch kit for 10,000ft. The sled is new to me this winter. I purchased and installed the clutch kit for my elevation. All that was included was weights and a different spring for the primary. So i'm confident my clutching is correct.
On the trail the sled will pull about 7,200rpms, and in deep snow only 6,400rpms. The motor feels like its got good power, but is not revving out. I heard the motor mounts are junk on these. I took a look at my mounts and noticed the one next to the exhaust can is completely torn. Could this be my problem? Im having a hard time finding a "harder/solid" motor mount to replace it. If anyone has any insight or a part number/website that would be awesome! Thanks!

 

[Bedhead]

Did you ride it before the clutch work? How was it? And at that altitude how much weight did you go with? My M7 has that same worn out motor mount and it still revs normal.

 

[Nickster914]

Did you ride it before the clutch work? How was it? And at that altitude how much weight did you go with? My M7 has that same worn out motor mount and it still revs normal.

I was not able to ride it before the clutch kit. The weights are 65.5 grams.

 

[flatspeed]

Mine was doing that and it turned out the adjuster in the secondary had backed all the way out. I screwed it in I think 5/8" from the cap and all good.

 

[geo]

Couple of things to quickly check.

Spring adj. is one (mentioned above). 5/8" is good with the White or Green.
Not getting close to full throttle (open hood, pull thumb thing, reach in and see how much further your finger can rotate the throttle).
Servo (exh. valve) not working or broken cable. (remove plastic cover from servo behind pipe; start engine, hope you are on a stand by now; rev to just 5500; observe function, should open and close (rotate) a couple of times; look for cables following drum)
The "tail light short". (do the brake light and tail light work, does the headlight dim at idle when applying brake).
Plugged or melted pressure sensor tube. (small "gas line" like tube coming out of the 'putor, pull it out to have a look for a wasp or something)

 

[Nickster914]

Couple of things to quickly check.

Spring adj. is one (mentioned above). 5/8" is good with the White or Green.
Not getting close to full throttle (open hood, pull thumb thing, reach in and see how much further your finger can rotate the throttle).
Servo (exh. valve) not working or broken cable. (remove plastic cover from servo behind pipe; start engine, hope you are on a stand by now; rev to just 5500; observe function, should open and close (rotate) a couple of times; look for cables following drum)
The "tail light short". (do the brake light and tail light work, does the headlight dim at idle when applying brake).
Plugged or melted pressure sensor tube. (small "gas line" like tube coming out of the 'putor, pull it out to have a look for a wasp or something)

Awesome! thanks! The taillight short seems crazy but i thought i noticed it wasn't working. What would that have to do with the rpms?

 

[geo]

Computers, servos, injectors, coils; intermittent voltage or amperage = confused.

 

[CATSLEDMAN1]

tal lights and rubber

tail light is a must to check on older M7

aftermarket belt on the M7 often will cost you 800 rpm and turn the sled into a pig

 

[Nickster914]

tail light is a must to check on older M7

aftermarket belt on the M7 often will cost you 800 rpm and turn the sled into a pig

What am I looking for with the tail light?

 

[pano-dude]

Clean exhaust valves and adjust?