The Ultimate Off Road Bonanza Build Returns
- Thread starter Bonanza Bryan
- Start date
Couple updates. I had to build a new sprocket hub. My old one failed it completely tore apart I was putting too much power into it. On the new one I welded a 1/4 plate to the mounting side of it and gusseted to where the sprocket bolts. I also am running a aluminum sprocket adapter to space out the sprocket to clear the tire a little better and allow me to use one of these 60t steel sprockets with the 4 hole bolt pattern. I then drilled out the sprocket to also accept the 6 hole bolt pattern so that this sprocket was bolted down tight and will never flex or move. Also probably the biggest mod to my chain drive system was the addition of a chain guide. Works great and I haven’t been able to throw the chain. This will allow me to run the chain a little looser so I’m not putting too much pressure on my jackshaft and wheel bearings
Many of the 24 mm flatslides that I have come with a 100 main and a 30 pilot jet. But I have seen a wide variance in the needle, like I said before. My best results have come from trying a new carb first, then determining what direction the netting needs to go. If you have a bike/ carb that is easy to swap jets on, use it as a test mule. Jet it too rich, and then back it off until it runs best. Much better to actually learn this than to aimlessly try everyone else's combination, imho. Lots and lots of jetting tutorials around. Needle changes (raising and lowering) impact the largest section of the rpm range, and it's easy to do. Starting there can give you an idea of the direction you need to go. Get needle and main jet working well, then dial in the air or fuel screw setting with the pilot jet for most rpm at idle with least throttle valve opening, and a steady idle. That should get you really close. I have several dozen jets, jet drills, and a magnifying glass to read the tiny numbers. Guessing at jetting is just plain frustrating. Add a vaccuum leak, or bad spark in to the mix and you have a tuning nightmare.
Nice looking work, Bryan! I really like those sunf tires. What jackshaft gear are you running? It seems like the tavs come with a 10 tooth gear on the driver. I still have the stock 50 tooth on my rear, but I think I am running an 8 or 9 tooth gear on my tav. Lots of really nice work on your bike. I hope you get a shot at the gambler 500 this year. Too far to run for me, in Central KY. TONS of good places to ride here, though. Thanks for sharing most of your secrets!
Sorry to hear this! Maybe a year off can stiffen the competition. I don't see John and Ike having a contender that can match the time and effort of your build, and it would probably take deep pockets and a sponsorship of some kind to overcome your beautiful work. I look forward to more! Thanks for sharing!
