Archived posting to the Leica Users Group, 2003/12/06

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Subject: Re: [Leica] Crank, flywheel & gear advice
From: SDP35 <sdp35@cwazy.co.uk>
Date: Sat, 6 Dec 2003 18:54:33 -0500

I want to know if it's going to have a rapidwinder er kickstart or a 
motordrive...

CZ
NC

On Saturday, Dec 6, 2003, at 18:24 US/Eastern, Michiel Fokkema wrote:

> You need a screwmount, no way it would work with a bayonet. Make sure 
> it is adjusted for slow speeds, this is very important when using a 
> shorter fourth gear. Another possibility is to remove the goggles, 
> this will free the flywheel, but make sure the cam is adjusted!:-)
>
> Michiel Fokkema
>
> John Collier wrote:
>
>> As you all know I am building up a 125 engine using an ETS cylinder, 
>> piston, head and a 100 sport engine as a base. I have had my local 2 
>> stroke shop bore the cylinder. They did a great job and beveled the 
>> ports nicely too. I also had them deck the head and cylinder and 
>> o-ring the cylinder. This is a narrow groove into which you insert 
>> stainless wire; simple, cheap and it works. I also have rounded up 
>> some inexpensive nos vmb cases (dunno why but they were half price), 
>> a four speed conversion kit and a primavera primary gear set. Still 
>> to go is polishing and match porting the cases, cylinder, piston and 
>> manifolds. I am also going to try and source a PK multi spring clutch 
>> for no particular reason I can think off.
>> So far so good and PLEASE nobody ask how much this has all cost! 
>> Remember I got the bike for free :-)
>> Now I have a stock crank and a 100 sport flywheel and I would like to 
>> go to a lighter flywheel. This leaves me with two options. First, 
>> lighten the 100 sport flywheel and stay with the stock crank. Is it 
>> easy to do or is it also easy for an inexperienced person to machine 
>> the magnets off? Second, get a XL crank large taper crank and a HP 
>> flywheel;  more money but stronger. Can I keep the 12v battery set up 
>> with an HP flywheel? Someone told me I couldn't and someone told me I 
>> could. Dunno who is right.
>> I would greatly appreciate direction here. While money is not too 
>> much of a concern, if the stock set up is fine then I might as well 
>> go that way.
>> Finally I see that you can get a shorter fourth gear kit. I assume 
>> this tightens up the jump from third to fourth and allows you to get 
>> a higher top speed by taking advantage of higher revs. Is this a good 
>> idea or is it more for a hopped up, narrow power band engine.
>> Just plain ignorant in Edmonton,
>> John
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