WTB 26 tooth Mpi supercharger pulley. Found steel alternative?

[jgustman]

Hope to spot a MPI 180 kit pulley, 26 tooth. I have found the steel alternative that gates makes, wondering if I can just use one of them instead.

Gates P26-8MGT-20 Sprocket

PowerGrip and PolyChain 8M 8mm Pitch for Belts 20mm Wide - Price: $101.15; Number of Teeth: 26; SKU: 7708-2026

www.biedlers-belts.com

 

[74Nitro]

Hope to spot a MPI 180 kit pulley, 26 tooth. I have found the steel alternative that gates makes, wondering if I can just use one of them instead.

Gates P26-8MGT-20 Sprocket

PowerGrip and PolyChain 8M 8mm Pitch for Belts 20mm Wide - Price: $101.15; Number of Teeth: 26; SKU: 7708-2026

www.biedlers-belts.com

Isn't the 180HP level 28/28?

 

[jgustman]

No, the Yamaha Low altitude OEM had a 26 tooth lower for rtx/xtx. I just bought a different sled and already has the 28/28 for 3,500-6000 ft.

 

[74Nitro]

What altitude are you using the machine at?
I used to have a dynotech subscription. The 26 drive and 28 driven was 170 @9200 at sea level.
The 28/28 was 180 @9200 at sea level.

 

[jgustman]

Hp is irrelevant, looking at boost. We ride around 1100-1300 feet. My rtx is easily boosting over 7 psi on cold days with a 26 tooth lower. I don’t want to risk boosting more than 5 running 91 octane. So the 28 is out. It’s been bouncing off the rev limiter when I punch it seeing 9300+ briefly.. Running Ulmer‘s clutch kit. Added heel wt per his recommendation which helped but seems to want to under rev once shifted out. This is all going to change a bit on the 2013 xtx with 1.75 track I just bought. Any suggestions on clutching that?

 

[Srxspec]

That 26 tooth sprocket won't fit, the backside needs to be machined to gain clearance on the seal holder.

 

[jgustman]

That 26 tooth sprocket won't fit, the backside needs to be machined to gain clearance on the seal holder.

Options? Need a pulley, asap. machine the one I ordered?