Crank runout

Dooitorbust · Nov 6, 2018

Am I doing this right? Spark plugs are out and everything is solid. Just doing some maintenance and decided to check. 5 thou is up there..

https://youtu.be/YiVn_LXXX78

Caper11 · Nov 6, 2018

I don’t remember where on the crank stub your supposed to take that measurement.
It does look like its out of spec.

Dooitorbust · Nov 6, 2018

Caper11 said:
I don’t remember where on the crank stub your supposed to take that measurement.
It does look like its out of spec.

It’s about 1/4” from the end of the stub. Any idea what spec is?

pfi572 · Nov 6, 2018

Pto is 1/4" from end. .0024" is max for pto if I remember right .
Another source says 1/8” from end .

Bnorth · Nov 6, 2018

The distance from the end of the stub doesn't matter much but I think skidoo calls for an inch. I prefer to turn it over with the recoil as I noticed some induced error by using the bolt and a ratchet. Get your dial indicator as low as it goes and set it to 0 then see the highest reading. Looks like 5 thou. I think spec used to be 2.5 thou and is now 5. I wouldn't be concerned at 5. How many km on it?

Dooitorbust · Nov 6, 2018

Bnorth said:
The distance from the end of the stub doesn't matter much but I think skidoo calls for an inch. I prefer to turn it over with the recoil as I noticed some induced error by using the bolt and a ratchet. Get your dial indicator as low as it goes and set it to 0 then see the highest reading. Looks like 5 thou. I think spec used to be 2.5 thou and is now 5. I wouldn't be concerned at 5. How many km on it?

Yeah it’s 5 thou. Video looks good on the iPhone, but garbage on YouTube. I’ll try it again using your method and see what I get. I wanna say it has about 1800k? I’ll have to double check when I get it back together. Warranty is up in December but that doesn’t really matter now...

Dooitorbust · Nov 6, 2018

Bnorth said:
The distance from the end of the stub doesn't matter much but I think skidoo calls for an inch. I prefer to turn it over with the recoil as I noticed some induced error by using the bolt and a ratchet. Get your dial indicator as low as it goes and set it to 0 then see the highest reading. Looks like 5 thou. I think spec used to be 2.5 thou and is now 5. I wouldn't be concerned at 5. How many km on it?

4 thou with the dial indicator bottomed out and using the recoil. I’d say I’m probably ok.

Bnorth · Nov 6, 2018

Dooitorbust said:
4 thou with the dial indicator bottomed out and using the recoil. I’d say I’m probably ok.

Yup not enough for warranty and not bad enough to worry about doing it yourself yet. I traded in my 14 with 9.5 thou, that was a time bomb.

Ballzdeep · Nov 6, 2018

Bnorth said:
Yup not enough for warranty and not bad enough to worry about doing it yourself yet. I traded in my 14 with 9.5 thou, that was a time bomb.

How many km to get that bad?

Caper11 · Nov 6, 2018

Humm when did the crank runout on the 800 etec change. It was always .0024””.

Lol did it get changed with the HP rating???

Bnorth · Nov 6, 2018

Ballzdeep said:
How many km to get that bad?

6200km

Caper11 said:
Humm when did the crank runout on the 800 etec change. It was always .0024””.

Lol did it get changed with the HP rating???

Tried to get one warrantied last year and BRP instructed my dealer through the dealer communication that it was 5 thou now. So I guess it changes on a case by case basis when warranty starts to get too expensive.

Dooitorbust · Nov 6, 2018

Thanks for the help. Maybe a new 850 for me next year. Or an Alpha.. or a Sidewinder... Whatever one weighs the least LOL hahaha.
Seriously though, it’s been a good sled to me. Bring on the pow.

Crank runout

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