Did they produce a compression release head?

Yea I could understand that to a point. Have you been having these issues because I could see if there was a heavy bump start you could loosen it some but when the motor goes to power it reapplys the force to it to basically retighten what it just loosened. I really dont think that by applying force to the crank that you should ever be able to unthread the rear sprocket. If so it probably wasnt tight in the first place wouldnt you think.
Im am glad that you are trying to keep us up on whats your going through so that when it comes out we'll all be prepared for what to do and what to watch out for. Ever since I got into motored bikes I have wanted to do this. Jackshafting was always the way but I never knew there were free wheel cranks to you all started talking about it. So now IM like that kid wanting that BB gun...but MOMs not here to tell me Im going to put an eye out. lol
Terry

The rear freewheel won't come loose, I don't think. It is the derailleur that will unwind. Currently the derailleur is springloaded to keep chain tension while allowing for varying chain lengths for shifting gears. Using it to drive the front chainring as you suggest will unwind the derailleur causing the top of the chain to loosen and fall off. Try this on your bike. Hold your front freewheel/chainring from spinning, then roll your bike forward. You will see your derailleur unwind. It would continue to do so until it ran out of slack and then it would actually turn the engine over. In the meantime the top of your chain now has all the slack your derailleur was taking up and will probably fall off.

Sure I totally understand what your talking about on that respect. The bike I have my freewheel crank on my front and rear are free and I dont plan on welding it because my crank has a 52 outer and a 39 inner gear on the crank and I plan on connecting to the larger one and working on my thigh muscles. What size are the crank gears that are on the kit that you two have been testing?
Terry

44t from the jackshaft and 36t to the rear hub.

Yeah I did have one brain fart - in a perfect world if the rear sprocket was locked then you could use the bike inertia to help start, but it would be quite problematic as Ghost0 points out. I got the gear on the way....

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Yeah I did have one brain fart - in a perfect world if the rear sprocket was locked then you could use the bike inertia to help start, but it would be quite problematic as Ghost0 points out. I got the gear on the way....
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Please dont think that Im badgering you two...until I can get my hands on the kit Im trying to visually put it all in my head and go through it as if I had one and have been riding everyday with it. Its a bad curse that I aquired when I worked at a printing company that did things that should not have been done with printing presses. BUt I had the ability to take in what they wanted actually see it run in my tiny little brain and work out alot of the bugs before attemting it on press. The guys that ran the presses would come in some night and see some werid thing on there press and hollar...DANG IT JONZ....remember when you got a fed ex shipment and left this thing on your door knob cause you werent home. You can thank me for causing that. lol

SO when Im out riding now I look down at the chain line and imagine what its going to be like when the right chain is turning and there is no left chain and guess what ...............
Its going to be all because of you two...I think thats PRETTY damn COOL

and if you only have one brain fart in a project like this that you two have taken on....I say GREAT JOB...you two are pulling off what takes a year or more and a DAMN many more people.

Terry

We've had a couple stinkers - trust me.

No problem, you and the others here keep us driving and make it FUN!! The good to come out of it all this ratio messing is time on the set-up and the different stresses and such the different gears and chains place on the design. It's all GOOD!!

MOSTLY I really dislike waiting for stuff at this point and the total lack of response from some suppliers....it's like some of these guys don't want business! I mean really wierd - if times are tough and some guys come along and want to buy 100+ gears, you would think suppliers would be eager to sell. Not so.

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Could anyone provide a link to what it is you are all talking about. I have no clue, yet this sounds interesting. Would this wheel be the same as a Raleigh with a three speed hub? Is this so that you can use that wheel? I'm going to buy an old Raleigh in a few hours and wondered about that rear wheel. Thanks.

Eliminating the driven sprocket

A three speed hub would work with the jackshaft.

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Thanks for the link. Very cool idea! Here is a link for you:

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