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All you dragracing types!!!!

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Guest

Guest
I've posted this on the www.dragbike.com advise forum too, but want to see what you guys think. I want info on the specs of the air cylinder I will need to shift my bike. What about the bore & the stroke & the overall size of the cylinder. Is there any thing else I need to know? I assume they return to "home" position after they shift.
Anything else?

Paul
 
Best bet is to look for a complete kit. Check MPS, Schnitz's, they have everything you'll need. They pretty much have the same standard actuator in most kits. The bike's shifter return spring will work fine cause once the air is bleed out of the actuator it doesn't add much weigh to the lever.

Pneumatic/hydraualic parts stores due carry them too and they come in differant size's and mounts, some even have a built in return spring.
 
I've pretty much got everything else. I just need to know the specs on the cylinder.
 
Depending how you have it mounted.

I have a Bimba cylinder currently. Maybe a 1" bore, 5" stoke, single acting.
My arm is about 2.5". I think I calculated about 7lbs of force.
They make about anything you could want. The stoke really won't matter as long as you make it long enough to allow the shift lever to work. I would try and make sure you have at least .5" of clearance on both sides.
 
LarryT posted this the other day, it may help you.

John Henry Forster Co.
4700 Le Bourget Dr.
St. Louis Mo. 63134-0820
www.jhf.com
Humphrey 310-12v 1/8 direct acting valve part number 310-120-50-60$25.50 Bimba Original line 1 1/16" bore cylinder part number 092-DP Base price $20.40 plus $1.35 per inch of stroke, 2" stroke = $23.10
you have a few options like Stainless steel rod $1.75 rod wiper $2.50
Thats $48.60 plus shipping for new parts
 
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