Messages

Thanks for your reply Teazer! I was wondering if that OW31 top end would bolt on to an R5 bottom end? Joe

John, I didn't think that you were still interested in building this motor for me. I would be happy to have you do this project! As far as the 2R9 cylinders, I was having problems locating a set for sale last year. Joe

JL Exhausts sells an OW31 TZ350 reproduction top end. Does anyone know anything about this product or have experience with it?

So, one of the rd400 engines that I have came all apart when I purchased a complete rd400 barn find with that extra engine. The parts are all there, but the crank has a bad rod bearing. Assuming that the crank needs rebuilt,
If 110mm rods are used instead of 115mm rods, could we then use the OW31 top end without a spacer?

OK All, I do have 2 rd400 complete engines and 2 r5 engines. One of the r5's is setup as a real TR3 top end with 34mm mikuni's, TR3 CDI, and factory chambers. The rules at the drag strip state that motorcycles must use motorcycle engines. Technically, a Banshee engine is a quad engine. Not sure which way to go A/C or L/C?

OK All, If I want to build a dirt drag engine for the 400cc gas class, 500 foot dirt track, can be 410cc max but 4 strokes can be 450cc. What's the best setup? Any and all opinions accepted! Joe

Would a LC setup like this be too hot for the street?

Yes Teaser, a reproduction 6 port with reed valves. Can a RD400 crank be built with 110mm rods?

Can R5 cases be used?

Hey All, Does anyone know if an OW31 Top End will bolt on to a RD 400 bottom end?

Hey VintageTZ thanks for all your input and expertise on my project. John Ritter will be my builder, and I'm sure that any and all ideas will be appreciated. Hopefully when completed, we will have one seriously nasty drag bike!!!! JR

Mount Pleasant is about an hour away from me. I will check him out. I did talk to John Ritter about the project, and he said he would be happy to do it starting in October. He has some good ideas about how to accomplish what I am trying to do. While he is on vacation this summer, I will concentrate on designing the frame and the rest of the chassis. I am in the manufacturing business, and have flat lasers, tube lasers,
both Mig and Tig welding as well as robotic welding, CNC tube bending etc.

Thanks for the info SoCal 250! I checked out the custom sleeves and they offer an aluminum sleeve that then would need plated after installation. I wonder if a plated cylinder would perform better?

Hey Teazer, I would like to pursue the re-sleeve option, if it's possible, because Ed Erlenbach had worked with Wossner to develop a racing piston for his 250 land speed project. I just need to find someone who does re-sleeving?

Hey Ed, Great Job on the 250!
I was wondering of you are interested in building a dirt drag engine for me?
If so, please let me know and I will fill you in on the details.
Joe