by 115-1172523331 » Mon Apr 21, 2008 6:38 pm
Hi Larry, The bike started life as a C200, the original Honda 90 (or Touring 90). It came with a pushrod engine. When Honda switched to OHC, they called them CT90's and the "Touring" version was dropped (I believe). This one has had the (pressed steel) frame SECTIONED 2" and the rear half of a C110 (50cc version) grafted on. The front forks (with leading link suspension) were also shortened and the rear shocks were replaced with fixed struts. A thinner seat was fitted to drop the top of seat height by nearly 6". What you can't see just under my nose is a periscope which will look out through a (to be added) transparent window in the nose. I raised the rear of the tank to fill the void between it and my body (for when it runs without the fairing) and a MyChron computer (data acq package) goes into that hole. The display unit is between the mirrors in the periscope. The motor is the reason I'm on this forum. It's a hemi with a 52mm bore (+3) and 46mm stroke and about 12:1 compression. Pistons are from a CB175 twin (stock Honda). I can go 2nd oversize and still be in 100cc class. (I might need the extra 2.3cc some day!) Current records for Partial Streamlined, 100cc pushrod engined Special Construction class at BV is around 65mph for either gas or fuel (most people run gas in fuel class unless there is a REAL fuel bike running - saves the engine and reduces the cost of changing class).
Tell me what made you decide on the MegaSquirt? Did you buy one or do a build it yourself? I want to run FI (and a blower) on the 100 someday. If the thought of a blown, FI, nitro burning 100cc single doesn't make you giggle, you don't have a sense of humor! I bought a CBR600 F4 throttle body setup on eBay to use as the basis, but that is still a ways off. One of the racers at BV is a Powertrain engineer for GM and says he will help with mechanical FI & a blower (his specialties). A Boeing engineer friend (from my former life) says I should look at the MegaSquirt.
Keep us up to date on the streetfighter, it looks like fun!
Doug
PS - What is your website? I was there once but have lost it!