Bent crank?

**sandjunkie** · #1 January 22nd, 2010, 05:38 PM

Hi guys
Could use a little help with a diagnose. I have a 09 rzr s with 1660 miles on it 400 turboed.No problems until two weekends ago.We were riding REAL hard in the sandwashes,got back to the trailer had lunch,one of guys went to take my rzr for a ride would not go in to any gear without grinding.GOT it home an tore it down.I noticed the secondary was spinning in park,tore clutches out and blew out with compressed air,in the process i noticed the primary needed to be rebuilt,so i bought a brand new one, going to have the old one rebuilt for a spare.Put it all back together with the new primary, STILL GRINDS. Put a third shim behind secondary,GRINDING GONE.Question is why would i have to shim the secondary after 1660 miles trouble free. RPMS THE SAME AS DAY ONE.Iam leaning towards a crank promblem? ANY IDEAS?

**johnnycat8** · #2 January 22nd, 2010, 06:37 PM

new prim was made a little diff thats why you needed to shim...should always ck this when changing prim or sec out.... a bent crank is real obv it wobbles ,....lol

**sandjunkie** · #3 January 22nd, 2010, 07:10 PM

Quote: Originally Posted by johnnycat8

new prim was made a little diff thats why you needed to shim...should always ck this when changing prim or sec out.... a bent crank is real obv it wobbles ,....lol

the crank has a wobble at idle seems to go away at higher rpm

**GIFF-TURBO RZR** · #4 January 22nd, 2010, 07:15 PM

If your crank was bent enough to cause the belt drag to turn the secondary you would be able to clearly see the primary would be out of concentric

**johnnycat8** · #5 January 22nd, 2010, 07:16 PM

Quote: Originally Posted by GIFF-TURBO RZR

If your crank was bent enough to cause the belt drag to turn the secondary you would be able to clearly see the primary would be out of concentric

concentric= wobble..for us dummys..............

**GIFF-TURBO RZR** · #6 January 22nd, 2010, 07:17 PM

Quote: Originally Posted by sandjunkie

Quote: Originally Posted by johnnycat8

new prim was made a little diff thats why you needed to shim...should always ck this when changing prim or sec out.... a bent crank is real obv it wobbles ,....lol

the crank has a wobble at idle seems to go away at higher rpm

the crank should never do anything except rotate

**sandjunkie** · #7 January 22nd, 2010, 07:19 PM

Quote: Originally Posted by johnnycat8

new prim was made a little diff thats why you needed to shim...should always ck this when changing prim or sec out.... a bent crank is real obv it wobbles ,....lol

Quote: Originally Posted by GIFF-TURBO RZR

If your crank was bent enough to cause the belt drag to turn the secondary you would be able to clearly see the primary would be out of concentric

you can see the wobble at idle

**strracerx** · #8 January 22nd, 2010, 07:21 PM

http://www.rzrforums.net/general-rzr...r-anymore.html

answer to your bent crank problems

**sandjunkie** · #9 January 22nd, 2010, 07:21 PM

whats my next move engine rebuild?

**GIFF-TURBO RZR** · #10 January 22nd, 2010, 07:23 PM

Quote: Originally Posted by sandjunkie

Quote: Originally Posted by johnnycat8

new prim was made a little diff thats why you needed to shim...should always ck this when changing prim or sec out.... a bent crank is real obv it wobbles ,....lol

Quote: Originally Posted by GIFF-TURBO RZR

If your crank was bent enough to cause the belt drag to turn the secondary you would be able to clearly see the primary would be out of concentric

you can see the wobble at idle

How much boost and RPM were you running?

**johnnycat8** · #11 January 22nd, 2010, 07:24 PM

Quote: Originally Posted by GIFF-TURBO RZR

Quote: Originally Posted by sandjunkie

Quote: Originally Posted by johnnycat8

new prim was made a little diff thats why you needed to shim...should always ck this when changing prim or sec out.... a bent crank is real obv it wobbles ,....lol

the crank has a wobble at idle seems to go away at higher rpm

the crank should never do anything except rotate

darn i thought it would make a great branch chipper...lol but for real like gary said it should just spin no weble wobble ...id take off the primary and start it for a few sec to verify its the crank...

**sandjunkie** · #12 January 22nd, 2010, 07:34 PM

Quote: Originally Posted by giff-turbo rzr

Quote: Originally Posted by sandjunkie

Quote: Originally Posted by johnnycat8

new prim was made a little diff thats why you needed to shim...should always ck this when changing prim or sec out.... A bent crank is real obv it wobbles ,....lol

Quote: Originally Posted by giff-turbo rzr

if your crank was bent enough to cause the belt drag to turn the secondary you would be able to clearly see the primary would be out of concentric

you can see the wobble at idle

how much boost and rpm were you running?

10 psi 6300 6400

**GIFF-TURBO RZR** · #13 January 22nd, 2010, 07:45 PM

A symptom of a bent crank is the engine wants to die at idle dose yours idle OK? you should be around 1100rpm at idle

**strracerx** · #14 January 22nd, 2010, 07:48 PM

Quote: Originally Posted by GIFF-TURBO RZR

A symptom of a bent crank is the engine wants to die at idle dose yours idle OK? you should be around 1100rpm at idle

or a bent crank is what happens when a chick tries the reach around move and your likw WTF

**sandjunkie** · #15 January 22nd, 2010, 07:52 PM

Quote: Originally Posted by GIFF-TURBO RZR

A symptom of a bent crank is the engine wants to die at idle dose yours idle OK? you should be around 1100rpm at idle

yes idles fine

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