Custom Clutch bar and Piston Skirt Trimming

reg454 · #1 (**permalink**) 06-04-2009, 12:36 PM

Some Mods I did while I had the motor off today and for the next week.

The first Photo is where the piston skirt is normal on the top stroke.

The Second Photo is after I trimmed the Skirt.

The Third is the piston skirt after I trimmed.

the Forth photo is the custom Clutch Arm I made and some dampening of the clutch housing.

Can not wait till I get the motor back on the bike to feel the difference. :-)

I also port matched the exhaust but no need for a photo their are enouph of those around to show you how to do it. If anyone needs help on making their own clutch arm let me know and i will let you know how I did it.(Cutoff wheel, a saw, drill press, a sander, and a tap set) use the old one as a form of template.

reg454 · #2 (**permalink**) 06-04-2009, 12:53 PM

Edit I am making a better front mount so I removed the photo.

Custom clutch arm more photo's in page 2.

Junster · #3 (**permalink**) 06-05-2009, 03:01 AM

This is how I dampened my clutch cover. It's an old motorcycle tank badge. They are pretty easy to remove. Just saw it off the tank with some dental floss. They're pretty soft and easy to flatten.

reg454 · #4 (**permalink**) 06-05-2009, 12:45 PM

nice looks cool too.

Junster · #5 (**permalink**) 06-05-2009, 04:44 PM

Thanks reg454, So I've been considering doing the piston skirt trim. I'm hesitant because of the carb blow back I'm already getting. (Oily Airfilter) I mean the blow back is probably coming from the downstroke on the piston anyway. Have you done this to other motors? What gains are you seeing? WOT or mid torque?

reg454 · #6 (**permalink**) 06-05-2009, 07:25 PM

Quote:

Originally Posted by Junster

Thanks reg454, So I've been considering doing the piston skirt trim. I'm hesitant because of the carb blow back I'm already getting. (Oily Airfilter) I mean the blow back is probably coming from the downstroke on the piston anyway. Have you done this to other motors? What gains are you seeing? WOT or mid torque?

This is the only motor I have. From what I have read it gives makes the motor run smoother from allowing a full cycle of air and gas to get to the innards of it. I have read on this forum and another forum people that have done it have gotten good results I only had to trim a little bit off like a 1/16" of an inch but from the photo you see I did not get all of it off for a reason.

I have yet to put it back on the bike I am still doing other mods like building my own exhaust system.

reg454 · #7 (**permalink**) 06-05-2009, 07:25 PM

Quote:

Originally Posted by Junster

Thanks reg454, So I've been considering doing the piston skirt trim. I'm hesitant because of the carb blow back I'm already getting. (Oily Airfilter) I mean the blow back is probably coming from the downstroke on the piston anyway. Have you done this to other motors? What gains are you seeing? WOT or mid torque?

What do you think of the custom clutch arm? I made it in like an hour.