Yamaha sully427 engine build

sully427

Red Rider - UTVUnderground Approved
Well got most of the parts to put this thing back together. Earlier this year i cracked my cases out at the dunes. I called Jason at Weller and started a parts list, Jason supplied me with a set of used cases that he gusseted just like his race motors and also did the oil mod as well.
other parts from Weller
cam pins
stage II cam
head studs
diff plate
kibble springs with ty retainers
and necessary gaskets
I'm installing a hot rods heavy duty crank and rod setup (stock stroke) it was already a 686 but I'm replacing the piston because of wrist pin gulling and excessive skirt wear it was a wiesco 11:1 but I've heard people really like cp any suggestions on brands are welcome. also was wondering about nic coating the cylinder
major thanks to Jason at Weller I've called him about 12 times just to pick his brain and he is always nice as can be and always helpfully.
 
Good luck with the motor. Sound's like its going to lay down the power. ;)
 
yeah should work alright going to try the lectron carb my buddy has a used one laying around. my idea is to get it as reliable as possible.
just want to get back to this.
 

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other parts from Weller
cam pins
stage II cam
head studs
diff plate
kibble springs with ty retainers
and necessary gaskets
I'm installing a hot rods heavy duty crank and rod setup (stock stroke) it was already a 686 but I'm replacing the piston because of wrist pin gulling and excessive skirt wear it was a wiesco 11:1 but I've heard people really like cp any suggestions on brands are welcome. also was wondering about nic coating the cylinder
major thanks to Jason at Weller I've called him about 12 times just to pick his brain and he is always nice as can be and always helpfully.

Wow, sounds awesome.
I've read (and heard one report firsthand) of mixed results with Kibblewhite springs in ATVs...but if Weller recommends them then I wouldn't worry about it.

Coating the cylinder is one of those things that not a lot of people think about, but is good to do from a friction reduction/longevitiy standpoint. I'd do it if I was building my motor up and had the coin to do it.

CP pistons seem to be the top recommended piston on the forums...IMHO learn from other people's mistakes and successes and get one.
 
Yes, definitely use the CP Piston. And since you have already experienced pin galling, get the DLC pin upgrade for the CP Piston. You'll never have a galling problem again.

On another note, I have installed countless Kibblewhite spring kits and valves and they have been bullet proof.
 
awsome thanks for the info do you sell the cp with upgraded wrist pin, if so how much ?
thanks clint
 
I got my CP 11:1 piston and DLC pin from S2k1. Chris knows his stuff for sure!!
 
I only have about 50 hours on my 11:1 CP, but I haven't heard anything bad about them in the Rhino's
 
right on I just got the diff plate assembled and the bearings pulled out of the old cases hopefully get some more done soon. need a price on that cp
thanks
 
are you jumping that thing. because if so that is why it cracked the cases. what a homo. well good luck. i will head over your way and drink beer and watch you work on it. get good at it because i have a motor that has a LITTLE knock....
SPODY OUT!!!!
 
beer is good
[ame=http://www.youtube.com/watch?v=awzyLJFh1lQ]YouTube - Psychostick - "BEER!!!"[/ame]
 
couple pics of her guts
new cases with up grades
old cases with cracks
piston with scratched up skirt
new crank in freezer
 

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got the cp piston the other day shes, comin together how do you guys feel about the lectron carb 48mm? I think I will be giving that a try its gotta be better than stock
 
yeah helps with the install. frozen bearing and heated cases goes together easier. my girl is wondering wtf too.
 

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