WetHead Build

[Billy]

I don't know if it's finished, but I believe this tuner is done with it. It's still there, 12" of snow the other day, now the roads are wet with sandy and salty water.

He sent me these 2 charts. I think it still needs work between 2200-3500 and above 5400...

[1FSTRK]

What did you end up with for a clutch set up?

Used the SE VPC. Looks identical to the AIM, except the weights are a different color.

I think this is part of your problem down low on the graph. Ask for the run file or a graph of the gear ratio.

[joe_lyons]

This is the issue that I had brought up earlier but it was dismissed as over exhausting.  The VP is a good setup from 3+ with a stock spring but it has less PSI then it did stock below 3k rpm.  Look at this pic and it shows that.  The different leverage point alters the overall pressure applied like the ''clutch wiz'' does.  It probably will not slip from 3500 on because of the way the VP works.  A view of the gear ratio would let us know for sure but it looks like the issue to me but it is still looks like a decent running bike.

[attachment removed after 60 days by system]

[1FSTRK]

Good information Joe. I believe both conditions contributed and still exist. The new pipe did not totally cure the exhaust flow problem but helped enough to make he clutch problem worse.

It would also be interesting to see the timing curve and if any is being pulled at the hit of the throttle.

[Billy]

I sent an early stock spring (.071) with the pipes for the HD shop to install, not sure if they put it in or not. I will ask for a gear ratio chart and post it if I can get it.

I sent TR the first set of charts I posted, he thinks the timing needs to be addressed between 2600-3500, and above 5000.

Nobody has ridden the bike since the first tune, due to weather and road conditions, but hopefully soon will get a riding impression.

Thanks 1FSTRK and Joe.

[joe_lyons]

Did you hear any more news or get any charts?

[Billy]

Did you hear any more news or get any charts?

I sent him a request for a gear ratio chart, waiting to hear back. Thanks

[Billy]

Joe, I got this note with the chart.

"Really don't think there is a clutch issue. The spike as soon as the sampling starts is from the compensator and belt/isolators catching up."

[joe_lyons]

Looking at it in rpm scale tells a bit more. But it still looks like something.

[rageglide]

Maybe he will send you the run file?

[joe_lyons]

Yes the runfile would make things simpler.

[1FSTRK]

Joe, I got this note with the chart.

"Really don't think there is a clutch issue. The spike as soon as the sampling starts is from the compensator and belt/isolators catching up."

As far as the gear ratio graph goes I would be more concerned with the 50-80 mph portion of the graph as well as the fact they sent a mph scale rather than rpm.
If you do get your entire run file you can look at all the information it contains. At this point I would be surprised if they did any ecm data collection during the run so seeing if timing was being pulled would be out of reach.
I do not think this cam pipe combo is going to be one that jumps straight up at 2000 rpm but I would bet there is a bit to be gained with some fine tuning and attention to details.

[Billy]

While I agree some fine tuning may make some slight improvements, for now he's gonna put some miles on it when weather permits, and then address any areas that may be problematic.

Thanks to everyone for the comments. 

[Bagger]

Interesting thread, especially comments about exhaust recommendation.