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The diagram you posted shows the ranges for both sizes. The range increase is negligible. The one drive never makes a true one to one ratio, basically an under-drive.luckily that is not the one I have. I believe it would be worse than it is. I have been in contact with many others, all report the sa...

My drive is the top in the diagram. Interesting thing to note is it only shifts the range. It does not increase it. It moves the entire range 0.24. This can be altered by changing the final drive. We tried that. Utterly useless change. The five speed having a overdrive gives me much more gear spread...

We have a 10hp Sterling engine which is a Yanmar clone and used a 40 series Comet. We tried several different gear ratios and the 40 series Comet is not adjustable. The real problem is that the drive acts as a direct link to the Comet. If speed changes in the slightest the drive changes. So as you s...

I used a CM400 Honda that worked well... We used a Comet variable belt drive. If you have hills do NOT use a variable belt drive. You can't keep speed up hills. .... Did you try different tunes to the CVT? Curious to why you could not get that to work. Granted this is a different topic and should b...

I used a CM400 Honda that worked well because it is a backbone frame. We made our own cradle and bolted it in. We used a Comet variable belt drive. If you have hills do NOT use a variable belt drive. You can't keep speed up hills. I am putting a five speed together for mine now. We took the engine/t...

The plan is to make everything we can before cutting. We are enjoying riding season. We are actually turning the crankshaft from the kawasaki engine into a jackshaft to correct rotation. We are making a plate to seal where the cylinders where. The trans has five speeds. We know we will have to stret...

The kaw trans we are going to use has an aluminum case and weights about 10 pounds less than the current unit. (the case we built is heavy.) I checked the ratios in the trans. First is lower and fifth is higher than the comet can get. The range is broader than the comet. We have several rear sprocke...

We sped the drive up to "tune" where the clutch engaged. Normally those drives don't engage till around 1600rpm. This one pulls in around 1000rpm. The large rear sprocket was 'cause I hate freeways,. We geared for in town. I like the comet, but we are on a quest to see just how much mileag...

I do have a tensioner on the primary side. Its a simple pulley mounted on a slide with a lock bolt. Pull it tight, tighten the bolt. We made it using pulleys for idlers off a mower deck. We stepped up the speed on the input to the comet to get it to pull lower in the rpm. The drive pulley on the eng...

This is the bike the drive is on. 600x800CIMG1939.JPG 600x800CIMG1942.JPG This is a pic of the comet drive. Very tight. 600x800CIMG1928.JPG Here is the drive box we made from 4x4 box tube and the shafts we cut. 600x800CIMG1923.JPG Here is the top shaft. You can see the drive pulley from the engine o...

looks good :) Agricultural is the word I am looking for... :D One thing though, I would have thought a better seat would be a good idea :S And the exhaust looks good :) But like quite a few I have seen, the exhaust ends around your foot :S I would think it would be better if the end was behind you,...

Here's a couple more pics.

I'll have to pull the covers soon to do some cleaing. I'll get some good close pics then and post 'em. Been riding a lot. 42 and a full time college student, Mutt (that's what we call the bike) is cheap transit. All my family and friends save their old oil for me. Just finished a simple pump filter ...

My name screen name it phoenix827, but I go by Ben. My Father and I completed a bike last year. I've been running on used cooking oil. The engine seems to really run well on it. Seen very interesting, cool bikes on the site and realize there are very few here that understand my bike. Wanted to be ab...