silber rpm/clutch

colefrost · Feb 15, 2015

See video for problem, sled would not go over 7k rpm
http://youtu.be/gDgIXj-t2zM

Local dealer who did install thought reeds where the issue but just replaced and this was taken after replacement. I tried the following to fix issue:
Made sure turbo spun
Checked primary clutch spring
Checked weights
Changed plugs
Checked all pipe/turbo springs
put some lube on the clutch bushings/bearings

the issue seemed to resolve itself on the trail up or hard pack snow. Video taken at 6,300 ft unloading but when got to 8,500 feet in deep snow had problems again.

When I checked the clutch the sheaves seemed to stick a little unless perfectly aligned. I'm thinking this is the prob but not sure. Can I get the bearings replaced on the clutch to solve this?

Boston Racing · Feb 15, 2015

What year sled / kit?

diamonddave · Feb 15, 2015

Okay....I'm going to pretend that I didn't just see a video of somebody riding a sled without a helmet.

wellfed777 · Feb 15, 2015

what boston said is it a bully dog kit or a fuel controler ?
it sounds like as soon as it starts to boost it bogs
fueling is not right

oh yeah put a friking helmet on !!!!! come on sir ! haven't you ever heard the old
" i couldn't believe it happend i was just going mellow " :face-icon-small-dis

rant over sorry :focus:

yes clutch bushings can be replaced you need the tools to get them apart
and its not a good idea to grease or lube the clutch parts

jskattum606 · Feb 15, 2015

Id say its fueling, not the clutch. That the sound they make when they go rich. So if its a dobeck fueled sled, i bet it happens right when the box changes zones.

Boston Racing · Feb 15, 2015

If it's a dobeck kit it could be the tuning. If it's a ready I would look to make sure your power valves are opening.

colefrost · Feb 15, 2015

Ya, i was being stupid without the helmet.
Kit is on a '13 pro with reprogrammed ECU and external wastegate. About 100 miles since install from local silber rep

one more vid

https://www.youtube.com/watch?v=yf_YkUwcJQI

Boston Racing · Feb 16, 2015

I just pmd you my number. Call me

Wheel House Motorsports · Feb 19, 2015

swap fuel filters, i have fixed sleds that wont rev out due to clogged filter, yours sounds rich, but worth a shot, need more info on the base sled really to help much more.

Monty · Feb 19, 2015

I'd check exhaust valves

EZmoney · Feb 19, 2015

Make sure the blow off valve is no stuck open and have a look at the tps if it's set up correctly .

colefrost · Mar 8, 2015

Update

Just wanted to give everyone an update. '13 pro, 1000 miles w/ 100 boosted - silber external wastegate w/ reprogrammed ecu, pink spring with adj weights and red/red/red with 11 lbs, usually ride around 9000ft with a couple gallons 110

Checked all the springs on the exhaust,turbo and everywhere else for a boost leak
Pulled off the intake and made sure the turbo was spinning (spins freely on 150 miles on kit)
made sure the bushings and springs were ok in the clutch (the clutch has to be pushed perfect on the center or the sheaves stick a little
Replaced the reeds
Did a compression test with everything being great
Had a mechanic check the TPS

Went for a ride and the sled was doing fine but started to do the same thing but seems to only happen under 3/4 to full throttle. The sled does not want to get over 7000-7400 rpm.

How do you check the blowoff value?
Going to replace the fuel filter and does anyone think something could be screwed up with the clutch bushing?
Another vid also
https://www.youtube.com/watch?v=yf_YkUwcJQI

Thanks

mbccenter · Mar 10, 2015

Bad turbo bearings? Is it self lube? Any noise from turbo on shutdown?

colefrost · Mar 14, 2015

Not sure on bearing, how can you tell? It is not a self lube, but just makes the slight whistle when it is shut off. Fuel filter on the way, should be here today or tomorrow.

jay_boom · Dec 24, 2015

I am having similar issues with my sled, what did you figure out with this?

acutah · Dec 26, 2015

I'm pretty sure after he changed the fuel filter it was good to go.

jay_boom · Dec 27, 2015

Ah right on. Sorted mine our too, pto side exhaust valve hose came off. Easy fix

Hardass · Dec 28, 2015

when you shut your sled off you should hear the turbo spinning for quite some time.The journel bearing turbos i have seen out there will quit spinning almost as soon as you shut it off and barley spin at idle.

gsxr1k2 · Dec 28, 2015

I would also be suspect of you TSS switch in your throttle. I pulled mine out, taped shut and put in the velcro wiring bag under the hood. It would always mess with me.

If you do this I would highly recommend wearing a tether 100% of the time.

silber rpm/clutch

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