Peak Seeker
New member
- Joined
- Oct 2, 2025
- Messages
- 18
Alright, so I drilled both rivets out of the 8CR weights, and it improved things but still doesn't impress me much.
Looking at the 8CR weights, they're machined very toe heavy compared to the factory 8DF weights. And they apply a ton of force up early on, based on the weight charts in the info pages on here.
It will now pull ~8900 rpm, then fade down a bit to 8200 and hang out there. 3/4 throttle to full throttle creates no change in how it accelerates. It'll creep up to ~120km/hr on groomed trail, though the short loop i did near home doesn't give me a ton of time to wind it out before 90 degree corners.
The primary spring B-W-B may be a touch heavy, it's engaging up around 4800rpm.
Our wind loaded areas have 2-3' of soft snow to play in, and that where you notice the lack of track speed.
I'm going to now throw the factory 8DF weights with 2x 13.9mm steel rivets back in and see how it feels.
Edit after 2nd test rip:
It reacted as I suspected, considering all I've done by putting the factory weights back in is put heavier weights in...
So basically same feel, decent bottom end, smoother transition, but levels out at 7500rpm when WOT on a pull.
I don't want to drill the factory weights out because currently I'm feeling defeated and want to just put the thing back to stock.
Not sure where to go from here, 8CR weights empty with the stock Y-G-Y spring?
In my mind if it can't pull the factory weights then it must not be making the right power? I can't imagine I'm that far off on jetting.
Looking at the 8CR weights, they're machined very toe heavy compared to the factory 8DF weights. And they apply a ton of force up early on, based on the weight charts in the info pages on here.
It will now pull ~8900 rpm, then fade down a bit to 8200 and hang out there. 3/4 throttle to full throttle creates no change in how it accelerates. It'll creep up to ~120km/hr on groomed trail, though the short loop i did near home doesn't give me a ton of time to wind it out before 90 degree corners.
The primary spring B-W-B may be a touch heavy, it's engaging up around 4800rpm.
Our wind loaded areas have 2-3' of soft snow to play in, and that where you notice the lack of track speed.
I'm going to now throw the factory 8DF weights with 2x 13.9mm steel rivets back in and see how it feels.
Edit after 2nd test rip:
It reacted as I suspected, considering all I've done by putting the factory weights back in is put heavier weights in...
So basically same feel, decent bottom end, smoother transition, but levels out at 7500rpm when WOT on a pull.
I don't want to drill the factory weights out because currently I'm feeling defeated and want to just put the thing back to stock.
Not sure where to go from here, 8CR weights empty with the stock Y-G-Y spring?
In my mind if it can't pull the factory weights then it must not be making the right power? I can't imagine I'm that far off on jetting.
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