Archived posting to the Leica Users Group, 2003/12/06
[Author Prev] [Author Next] [Thread Prev] [Thread Next] [Author Index] [Topic Index] [Home] [Search]For a hundred-and-seventy-nine bucks get the Leica crank. For about six bucks get the HP in the 5 format in a thirty-six roll and the hell with the revs. Gears are gears. Buzz - -----Original Message----- From: owner-leica-users@mejac.palo-alto.ca.us [mailto:owner-leica-users@mejac.palo-alto.ca.us] On Behalf Of John Collier Sent: Saturday, December 06, 2003 4:33 PM To: leica-users@mejac.palo-alto.ca.us Subject: [Leica] Crank, flywheel & gear advice 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 - -- To unsubscribe, see http://mejac.palo-alto.ca.us/leica-users/unsub.html