Thanks Builder, Yeah the Hindle is nice. I still want that new in box yoshimura but who knows when that unicorn is going to be around. The rear sprocket is vortexI'm envious of that Hindle exhaust. I wish they made one for my bike. What brand is the rear sprocket? Coming along nicely!
Thanks , and sorry to hear about the broken humerus. For me the mx injuries weren’t bad for a long time then I went through 2 seasons where I was getting hurt , rehabbing, then getting hurt again right away. But when things are clicking it’s unlike anything else.welcome. you are doing nice work on the sling-shot. i just returned to mx about a year ago, after a 24 year absence, and was thoroughly enjoying myself riding at the local mx tracks...until i broke my humerus. oh well, healing at the moment.
i'm also into these oil-cooled gsxr's and ride my first gens at the local tracks. loads-o-fun in a similar but different manner than mx. interested in your build and post any questions you may have. good group around here.
nice work man. Not trying to shit in your cereal but before you go farther you might want to refine your design. If you are going for a velocity stack you need a bell shape and round edge to get the full effect of the venturi, then you can use different lengths to tune for pulse. Not a huge gain to be had but gains is gains if you're racing.
Thanks for the chart!!!! I think there may be a design change. I just gotta think about how I am going to do it
Looks like you have a compound so you can get the 7 degree angle. Then you just need a radius profile cutter. The radius on the lip is the most important part, or having a parabolic curve to act like one.
I can get the 7 degree angle , I don’t have a tool to get me the radius on the lip (but I am going to stop at a friends machine shop to see what he’s got) but worse case scenario I think I can make a bunch of straight cuts at increasing or decreasing angles to make the lip radius. There will be small flats that I can then file and sand out on the lathe by hand. I’m confident I can get it good but it would be much easier with the right tool. Either way I am going to give it a go on one Saturday. So I will post what I come up with.
Thanks, for that info. Wonder if anyone has done a comparison between factory air box with factory filter, factory air box with high flow filter, dual pods and 4 pods, then with velocity stacks of best design. On a dyno?nice work man. Not trying to shit in your cereal but before you go farther you might want to refine your design. If you are going for a velocity stack you need a bell shape and round edge to get the full effect of the venturi, then you can use different lengths to tune for pulse. Not a huge gain to be had but gains is gains if you're racing.
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Nice project! What year wheel set did you get? I'm looking for a parts list to do the same on my 86 1100.