Sled will not hold it's RPM

Doran.ry · Jan 19, 2019

Hey everyone I'm running a 2018 Freeride 137 1.75 track sea elevation with a Jaws shark Pipe 23/45 gearing stock clutching, I'm on clicker 3/4/5 currently on 4 the sled.will hit 8000rpm from.a dead stop but drops off quick, and when you drive for a bit a squeeze it's only hitting 7300-7400 and drops, im not to familiar with the clutch in world so any help would be great.

salmonbum · Jan 19, 2019

How many miles? I would see my old XPs and Revs do as you described when secondary spring was cashed out. Put a new one in and WOT would hold and no fade. Cheap place to start anyway. But I would go thru both clutches and measure your alignment of them. New Xps would have inconsistent rpms when they were out of alignment, which they all were.

sledhead_24_7 · Jan 19, 2019

Have taken off the Jaws pipe and tried it stock?
To make sure it is not the pipe causing your issue?

Dynamo^Joe · Jan 19, 2019

The primary clutch spring is a yellow/blue 120/300
Normally you just want to raise the final force of the spring to something like a 120/350 but there is no such spring.

120 is the start of shift
300 is the end of the shift (maximum speed)

...want to go to a xxx/350 to raise engine speed or prevent engine speed from lowering.

The point is to raise the final force of the spring to prevent rpms drifting low as you approach top speed.

The very next spring with a higher final force than the 120/300 is a blue/purple (150/350) #417224168

Just now you'll have about 250 rpms higher engagement speed because of the 150 start. But it will be the same engagement speed as an 850 trail sled.

Dont do anything to the clutching except change the primary clutch spring to a higher end force (blue/purple) and go drive the sled.

Doran.ry · Jan 23, 2019

There is 3400 miles on the sled, it was doing it with the stock pipe setup as well, some days it seems to be A1 and then others it is complete dog poo, I think I'm going to start with maybe a new spring and maybe different helix. I put a 27 tooth top gear in it to get some more top speed but I lost my mid range snap and I'm trying to get that back. Also I had the dealer align the clutches as I was having belt issues the first year.

Illinoispowder · Jan 24, 2019

Re

So does it have 27-45 or 23-45 gearing? 27-45 is too tall.

Doran.ry · Jan 31, 2019

It had 25 for a couple days but the problem all started with the stock gearing 23/45 25 was to tall.

Illinoispowder · Jan 31, 2019

Re

How many miles on the belt? A worn belt will definitely cause this issue, and seems fairly common on the Gen 4.

Doran.ry · Jan 31, 2019

400 miles on the belt.

Snow4life · Jan 31, 2019

I had the same problem on mine. Changed the belt, didn't help until after the new belt was broke in. Which I thought was strange. But after a half a day of riding I was hitting RPM's again. I wouldn't think your belt is shot at 400 miles, but it might be worth a try.

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Sled will not hold it's RPM

Doran.ry

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salmonbum

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sledhead_24_7

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Dynamo^Joe

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Doran.ry

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Illinoispowder

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Doran.ry

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Illinoispowder

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Doran.ry

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Snow4life

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