Street 2 stroker

[cwallis]

I know it's not MX, but the reason I wanted it is because when I was a kid and couldn't ride my motorcycle, I used to pretend my BMX bicycle was my moto bike. This is my old fart equivalent to my childhood BMX bicycle. Sort of a pit bike for the street. I found this seized up '73 RD 350 on craigslist for $550 in Albuquerque. I drove all the way out there to pick it up in a weekend. I tore it all the way apart and rebuilt the top end. Lo and behold, the sumbitch starts on the first kick. I'm going to cafe racer the shit out of it, but for now, I have a street legal 2 stroke. Does anyone else out there like to fill the neighborhood with blue smoke?

I think it's time to get rid of the Harley






click on images to see video drive by and my fat ass starting it without the gas on and almost seizing it up again:

[Neyhart198dad]

Cool,I had a chance to buy a RZ500 about 2 yrs ago and I kick my self everyday for not buying that beast,same thing locked up top end and $500.

Here is what you cafe racer could look like,pretty freakin cool.

http://forum.motorcycle-usa.com/atta...060908top1.jpg

[huffster]

Those things are a lot of fun in a straight line...Just be careful of the turns ! btw, the RD's were notorious for air-leaks....Run er rich or else !

[cwallis]

Cool,I had a chance to buy a RZ500 about 2 yrs ago and I kick my self everyday for not buying that beast,same thing locked up top end and $500.

Here is what you cafe racer could look like,pretty freakin cool.

Holy shit. I'd kill myself if i passed up an RZ 500 for that price. I really wanted an rz 350, but couldn't afford one. And yea, I've seen that design for a late model smoker. I really hope they build one for production.

Those things are a lot of fun in a straight line...Just be careful of the turns ! btw, the RD's were notorious for air-leaks....Run er rich or else !

Ha ha. yea. I bought her seized on the top end. I removed the oil injection pump to run premix and eliminated the stock air box to run uni filter pods. It came with 25 pilots and 140 mains. I now have 45 pilots and 180 mains just to be safe. Once i build the expansion chambers, I'll focus on jetting. And compared to my Harley, it's not only fun in a straight line, but turns like my bicycle!

[cwallis]

I built me some factory works pipes.

[TorkiT]

Good job on the hand built pipes. Those things are sick looking. How does it sound? Brraaap!!!

[SG Berm book]

That's kick ass, Chris!

[ascend75]

The custom pipes are awesome, how long did it take to make them?

[YAMATHUMP]

Sweet

[AnotherRedHead]

I want to see more fabrication pics.

[cwallis]

I want to see more fabrication pics.

I don't have any more in progress pics, but to start, there was alot of math involved. I had the aid of a book and 2 software programs to get my layout. I rolled the cones by using a rubber mallet and various diameter pieces of pipe clamped in a vise as an anvil, but a slip roll would have been very useful. I tacked them all together, then TIG welded all the seams with an internal argon purge. PM me if you want more details. I haven't had it on the road yet, because I took off the stock foot pegs and I'm making rearsets. I also cut off the welds at the kickstand mount and will have to relocate it. Hopefully this weekend, I'll have some pegs mounted and test ride it and post a vid. It starts on the first kick, but sounds like a brick of firecrackers going off. I plan to build some cans to subdue the sound a little.

how long did it take to make them?

About 40 hours of actual metal work and I couldn't tell you how much in research and poster board prototypes.



Anyone know of a place to Dyno this thing just to see a chart? Seat of the pants is all I really care about, but I'd be interested in some hard numbers if it didn't cost a shitload.

[bermmeister]

Al Lamb's Dallas Honda has state of the art dyno. Love the pipes.

[Neyhart198dad]

AnotherRedHead has a dyno to I believe.

[Dirtjunkie85]

all in all that is one sick bike!!!
i want one!!!!!!!!!!!!!

[motoxtorque]

Those things are a lot of fun in a straight line...Just be careful of the turns ! btw, the RD's were notorious for air-leaks....Run er rich or else !

Hey Kevin,

that yellow one that Burger had was crazy fast!!