Can Pin weight alone cause this?

Van Epps · Nov 22, 2009

Can pin weight alone cause the following problem?

we rode today in roughly 6-7' of baseless, heavy snow. I ride a light chassis, stock motor 04 Rev 162. I am running 15.4 grams pin weight.

I started the day on clicker 3 and the sled would not hit 8k under load. It was bouncing around between 7500-7700. I clicked up to 5 with NO CHANGE??

Question: Can to heavy pin weight alone cause this?
Question: If not, what are likely mechanical reasons for this?

Please help, heading to Sicamous on the 15th and can't be fighting this..

Thanks for any / all replys :beer;:beer;

Dootimes2 · Nov 22, 2009

Is this a new set up or have you been running it. Sounds like it is heavy for a stock 04. Take clutch apart and inspect it for wear and or broken parts. Don't forget to check the spring.

Van Epps · Nov 22, 2009

before todays ride I replaces roller w/washers, buttons w/o rings, cleaned and sanded the sheaves, blew out and cleaned inside of primary and installed a new bushing cup. Spring is brand new also.

Dootimes2 · Nov 22, 2009

Did you change weight. Notice any black marks on primary.

Van Epps · Nov 22, 2009

yes, changed weight, seems like new weights heavier. No black marks on primary...?

Im geared pretty low, 19 45 with 8 tooth drivers. Just swapped a 43 for the 45 tooth also..... I know, should have done one thing at a time right..

Dootimes2 · Nov 22, 2009

Can't rule out secondary either. Did you change it to as part of his kit?

Van Epps · Nov 22, 2009

yes, new/different spring in secondary also

Dootimes2 · Nov 22, 2009

Yea, that was a lot of changes at once. Still sounds like it is too heavy, but the whole thing with not gaining rpm's with clicker adjustments doesn't sound right. I only run 14.8 grams in my wifes 07 with a slp head, y-pipe, can, v-force 3 reeds, 19/46 gearing, 7 tooth drivers and a 162 x 2.5.

revrider · Nov 23, 2009

I tried running extra pin weight once and ended up taking them back out because I wouldnt hold rpms on clicker 3 where I like to run mine.I agree with Dootimes2 about rpms not changing with the clickers doesnt sound right. That make me think it could be your secondary.

BIG JOHN · Nov 23, 2009

If the clicker has little effect (cant always see it on the stock tach)...then pin weight is too heavy...the spring you installed in stiffer than stock (hold rpm better/backshift)...so drop the 2 inserts out and retest...(assuming the DPM/jetting is working)-BJ

Van Epps · Nov 23, 2009

Am going to pull inserts and re test...

Van Epps · Dec 1, 2009

OK, I pulled the inserts so the pin weight is now 13.8 grams (down from 15.4) SAME FRIGGEN THING?? Wah Wahs with max rpm's hitting 7700-7800 under FULL THROTTLE..... on the TRAIL and OFF TRAIL UNDER LOAD?

Seems to pull closer to 8000 rpm WITHOUT the Wah Wahs when throttle is open less than full. Once throttle is WO ... back to the Wah Wahs / 7700-7800 rpm. Clicking from position 3 to position 4 and no change...?

Anybody?

triple7 · Dec 1, 2009

What do the plugs look like? Sounds like you could possibly have an overrich condition. Could be that your dpm isnt working correctly, crap in your carb, etc.

Jake

Van Epps · Dec 1, 2009

couldn't plug check as snow conditions don't allow for a sustained pull.. to many stumps! Mains are at 390, not sure on pilots. thinking of cleaning carbs and going to 20 pilots (to richen mid range) as I am experiencing a hanging idle as well. Pulling my hair out, headed out for a trip Sat and the sled is a turd as it's running now.

How do I check for proper DPM function?

Macattack · Dec 1, 2009

ahh, same condition occurs with load (pow) and no load (trail)? Sounds weird. I'd have to guess that your primary is fighting with your secondary or the engine can't overcome the primary spring finish force.

theory: If you aren't reaching 8100, then it would seem your secondary is opening too soon. The lower gears may be tricking the secondary with a low ground force and the secondary opens too soon while your primary doesn't reach full shift. But at a longer run you'd eventually reach max rpm.

theory: Or, you are still too heavy with fly weigh mass. Engine can't spin the primary with the higher finish force spring. Like BJ said if the primary spring has a higher finish force, it may hold the rpms from bouncing around but if you don't have enough engine poop to spin it .... won't reach max rpm.

theory: Are the rave valves in good shape.

I'd empty the pins and click up until max rpm.

Redsledhead · Dec 1, 2009

IT sounds to me that when its going wah wah wah your hitting your rev limter. Had that happen on my 02 summit when I had the clickers turned up to high . Just my 02

Van Epps · Dec 1, 2009

Rev limiter at 7800?

I did empty the pins without any change. I also clicked up from 3 to 4 without change.

What type of issues with the raves could cause my issues?

Macattack · Dec 1, 2009

What about clicker 5 or 6? Any change there?

Sticky rave exhaust valves could limit the amount of power the engine produces. If they don't expand or compress, the exhaust port is limited only allowing max power in one condition. Changing the exhaust port allows more exhaust to escape, hence opening up more horse power to the engine.

The pilot only affects the bottom end. Idle to like an 1/8-1/4 throttle. Shimming the needle or moving the needle clip will fatten or lean out the mid range. 1/4-3/4

winter brew · Dec 1, 2009

Did you ride the same sled last year? And what has been changed if you did?

Dootimes2 · Dec 1, 2009

It is a pain, but maybe go back to your original set up and see if it makes any difference. It will help rule in or out the clutch setup. If it does the same thing clutching is not the problem.

Can Pin weight alone cause this?

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