Good ride in the snow storm until..

[ram4tow]

Me and some friends were riding through a field around smokey lake when this happened to a buddy of mine 2002 summit 800...





that i sold to him 4 years ago .. :d. from the looks of it it looked like he leaned it out bad. We dug into it further and noticed that one of the "Nipple/barb's" on the bottom of the DPM tree had broken off leaving the hose for the destroyed cylinders carb hanging, not sure if that would be the casue but just for fun he checked the compression on the other cylinder and it was 135 psi. not too bad for me doing the top end 4 years ago. Anyways he was buying a new XP anyways.

 

[team dirt]

It will buff out.

 

[maxwell]

thats a cool one. no core rebate on that bad boy! lol

 

[dvst8r]

A little JB weld and it will be good as new. :d

 

[Warhawk]

Good old BRP crank stuff MMMMMMMMMMMMM LOL

I can say this because i own one of these peices of crap

 

[teeroy]

Good old BRP crank stuff MMMMMMMMMMMMM LOL

I can say this because i own one of these peices of crap

yeah, who would expect that a 9 year old sled with a 4 yr old top end rebuild would have a crank problem? lol....

 

[maxwell]

probly doin mach 3 across a field too haha

 

[knee deep in it]

I had a 2007 Rev 800 that had a similar fate. I went to the shop and told them I had a coolant leak. I said " I think it coming through here" and I handed them a 3-4" square piece of the block.

 

[ram4tow]

Haha i handed him some JB WELD that was at the shop and said, "here this should fix her up". I also tried the "it'll buff out" the owner wasnt too thrilled.

I also forgot to mention he got a Cat clutch on it for some reason. (havent rode with him since i sold it to him) and apparently it was revving almost 9000 rpm (according to the tach) in the fields and apparently that seemed normal to him.

and yep.. he was doing more liek mach chicken (or at least it sounded like he was) beside me then it got quiet all of the sudden. haha

 

[maxwell]

ya if your gona mod a sled at least keep itin the family. not the first time ive seen a crank failure due to cat/poo clutches being installed.

and ya 9000rpm is screamin kill me!!

 

[SLEDBUNNYRACING]

It's always sad to see a sled die.
Well at least you did a good job of it!!!

 

[Modman]

apparently it was revving almost 9000 rpm .........

That's why it blew up right there. Rods were not designed to handle that sustained RPM.

800 Twin + high RPM = boom

 

[heavy d]

Just asking, what would be the difference what clutch you were running ? As long as it's balanced, maintained, and weighted properly, it should all be a go....no ?
I've had my polaris bottom end re-done by Indy Specialties, and the clutch supplied is a A/C. No where near the clutch as a P85, IMO, but non-the less, balanced, machined to fit, and the one supplied with the 5yr bottom end warrenty.
Is the problem, people putting on other OEM clutches and not knowing/understanding the set-up ?

Please elaborate

 

[maxwell]

i actually have no idea ive just seen many broken crank stubs on doos with p-85s.

some may laugh at me for this but i beleive the engineer who designed that crank designed it for a tra clutch weight and charactaristics.

but there are plenty of happy doos with p-85s also..

 

[Modman]

Just asking, what would be the difference what clutch you were running ? As long as it's balanced, maintained, and weighted properly, it should all be a go....no ?
I've had my polaris bottom end re-done by Indy Specialties, and the clutch supplied is a A/C. No where near the clutch as a P85, IMO, but non-the less, balanced, machined to fit, and the one supplied with the 5yr bottom end warrenty.
Is the problem, people putting on other OEM clutches and not knowing/understanding the set-up ?

Please elaborate

Yes, as long as its weighted properly to avoid overrevving. Stubs snap off because the crank run out is magnified by an unbalanced clutch swinging around, also could be a machining issue if the tapers are not perfect then the clutch might not sit square on the crank stub. There have been lots of them over the years with no issues. An unbalanced clutch can snap the stub, but overrevving is a setup issue, specific to each motor.

 

[jonniebud]

oops!!! looks like the bull shaft jumped the hefer gear

 

[Warhawk]

yes 9000rpm will let you see what she is really made of.

 

[foxrider]

Me and some friends were riding through a field around smokey lake when this happened to a buddy of mine 2002 summit 800...





that i sold to him 4 years ago .. :d. from the looks of it it looked like he leaned it out bad. We dug into it further and noticed that one of the "Nipple/barb's" on the bottom of the DPM tree had broken off leaving the hose for the destroyed cylinders carb hanging, not sure if that would be the casue but just for fun he checked the compression on the other cylinder and it was 135 psi. not too bad for me doing the top end 4 years ago. Anyways he was buying a new XP anyways.

Ha I ride near smokey as well. Great riding with all the fresh powder.

 

[foxrider]

That's why it blew up right there. Rods were not designed to handle that sustained RPM.

800 Twin + high RPM = boom

Exactly, I never put my my 97 summit 670 over 8000rpm.

 

[pano-dude]

Just asking, what would be the difference what clutch you were running ? As long as it's balanced, maintained, and weighted properly, it should all be a go....no ?
I've had my polaris bottom end re-done by Indy Specialties, and the clutch supplied is a A/C. No where near the clutch as a P85, IMO, but non-the less, balanced, machined to fit, and the one supplied with the 5yr bottom end warrenty.
Is the problem, people putting on other OEM clutches and not knowing/understanding the set-up ?

Please elaborate

this is becuase of the big bearings indy dan installs. the pto end of the crank is also different from stock poo( i think it is a cat stub actually).