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

[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]

Subject: [Leica] Crank, flywheel & gear advice
From: John Collier <jbcollier@shaw.ca>
Date: Sat, 06 Dec 2003 14:33:00 -0700
References: <04D04C5E-2778-11D8-B8F7-003065D4369C@forcemajeure.qc.ca> <3FD12D4D.3080406@wku.edu>

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

- --
To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html

Replies: Reply from Henning Wulff <henningw@archiphoto.com> (Re: [Leica] Crank, flywheel & gear advice)
Reply from Jerry Lehrer <jerryleh@pacbell.net> (Re: [Leica] Crank, flywheel & gear advice)
Reply from John Collier <jbcollier@shaw.ca> (Re: [Leica] Crank, flywheel & gear advice)
Reply from Michiel Fokkema <michiel.fokkema@wanadoo.nl> (Re: [Leica] Crank, flywheel & gear advice)
In reply to: Message from Luc Bourgeois <luc@forcemajeure.qc.ca> (Re: [Leica] WTB: V35 25x37 neg carrier)
Message from David Degner <david.degner@wku.edu> (Re: [Leica] WTB: V35 25x37 neg carrier)