Getting ready to re-assemble my 600 twin, I was running the thinner head gasket on 91 octane.
Its a Cometic gasket and measures .25mm. It comes in the kit C4021.
Anyway, I have since made the decision to use 91 octane plus at least 20 Oz. of Torco everytime I fill gas.
What do you recommend ? Keep in mind, I maybe burn 3 to 4 tanks of gas all winter, and will always be carrying a couple cans of Torco with me.
Its currently ported, and will soon be adding twin pipes.
My compression was at 128 PSI with the .25mm Cometic.
Its a Cometic gasket and measures .25mm. It comes in the kit C4021.
Anyway, I have since made the decision to use 91 octane plus at least 20 Oz. of Torco everytime I fill gas.
What do you recommend ? Keep in mind, I maybe burn 3 to 4 tanks of gas all winter, and will always be carrying a couple cans of Torco with me.
Its currently ported, and will soon be adding twin pipes.
My compression was at 128 PSI with the .25mm Cometic.
2004yamahaviper
New member
Sorry Can't answer your question but
Red head 700 conversion=bullet proof + more power
Red head 700 conversion=bullet proof + more power
Thank you ! and I know that, But that's not the point for this build. 
I make 128PSI with a .25 head gasket
Anyone know what thickness it would take to get to around 145PSI ?
Fuel quality is not a concern.
I make 128PSI with a .25 head gasket
Anyone know what thickness it would take to get to around 145PSI ?
Fuel quality is not a concern.
Vincent
New member
Thank you ! and I know that, But that's not the point for this build.
I make 128PSI with a .25 head gasket
Anyone know what thickness it would take to get to around 145PSI ?
Fuel quality is not a concern.
FWIW on my 700 redhead removing the middle layer in my headgaskets brought the thickness from 0.7mm to 0.46mm
Compression pressure went from 120 -122- 121 psi, to 127- 130- 128 psi.
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A couple of bucks
VIP Member
I am running a 95 VMax .6mm head gasket and my numbers are 139 & 141. This is on a 96 XT6. Stock was 1.4 I believe.
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A couple of bucks
VIP Member
A couple of bucks
VIP Member
Time for rings if your only at 128 w/ a .25mm head gasket.
Mine is a be-otch to pull over w/ the .6mm h/g.
SXR 700 tripple
New member
2001 SXR with one layer removed. I have 150 psi across all 3 cylinders. 120's seems low.
Vincent
New member
And still it impressed my budy who rides a low mileage 2012 Ski doo Renegade 800 E-teck . When he drove my old Venture his exact words were " Holly crap! This thing is more responsive the my Renegade!"
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SXR 700 tripple
New member
Yeah my old red head has never let me down in the 6000 Kms I put on it
But it's no match for my rush 800
But it's no match for my rush 800
Mind you, the 128 was after the motor busted off a skirt becuse cylinders had been honed too may times, had lots of blow by ....
Cylinders are now at US Chrome being replated.
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Just wondering what is the stock compression on a 2000 venture 700 (redhead) also thinking of doing the head gasket mod sled is running at 125psi on all three!
Vincent
New member
That's about right. Ironically I also have a 2000 venture 700.......I gain about 5 psi across all three after removing the middle layer of my headgaskets.
5psi gain did you notice much power difference?
Vincent
New member
With all honestly, I did thin head gasket, Reed stopper notch mod, Apex helix, removed battery, starter and ring gear, rebuilt both my clutchs, also added home made transfer rods....basically all at once.
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when you installed the apex helix did you adjust the secondary any different than the stock setting?
Vincent
New member
The stock 70 twist works great . I'm currently running 80 for the little extra hard hitting acceleration
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A couple of bucks
VIP Member
Anything new?
Are you asking that to me?
A couple of bucks
VIP Member
Well yea. Is she back together?