RZ350 Super Motard

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JanBros
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Re: RZ350 Super Motard

#961 Post by JanBros » Thu May 10, 2018 5:56 pm

best is to let the baffle end in the stinger with a nozzle, and then go wider again. that way the diemater or length of the stinger has no influence anymore.

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if it runs, you can race it !

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Smoker
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Re: RZ350 Super Motard

#962 Post by Smoker » Thu May 10, 2018 9:25 pm

That makes it perfectly clear. :smt003

Please explain more, Jan.

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JanBros
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Re: RZ350 Super Motard

#963 Post by JanBros » Fri May 11, 2018 6:48 am

the nozzle is the bit that determines the flow in the stinger. if you make the real stinger about 1.5 times the diameter of the nozzle, anything that happens after the nozzle has no influence. If I make a pipe, I weld on a "stinger" of about 10cm long , about 2 times the diameter of the nozle. I turn the nozzle on the lath (length about 1/3rd of the , slide it in and than stick the real stinger behind it and pull everything together with 2 springs. This way you can take out the nozzle and change it's inner diameter to find the correct size to create the best back-pressure.
I'm certainly not an expert, I just read the right fora like the ESE topic on kiwibiker or the RSA topic on pitlane (the drawing comes from one of them).
based on the knowledge of Frits and Wobbly, I made this pipe-calculator :

http://users.telenet.be/jannemie/FOS%20 ... black.xlsm" onclick="window.open(this.href);return false;
if it runs, you can race it !

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Smoker
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Re: RZ350 Super Motard

#964 Post by Smoker » Fri May 11, 2018 10:35 am

Thank you very much, Jan! :smt006

Very interesting info. I will study the information, so I understand more about making pipes.

I do understand your explanation about the "nozzle" and stinger diameter. I purchased 16 gauge 1 inch OD tubing for the stingers, but have not used it, yet. I know an excellent pipe manufacturer that uses this tubing for his stingers, so I thought it would be okay. I'll try to figure out the stinger diameter with your pipe info and see if my tubing will be close in diameter.

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Smoker
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Re: RZ350 Super Motard

#965 Post by Smoker » Fri May 11, 2018 10:40 am

JanBros wrote:best is to let the baffle end in the stinger with a nozzle, and then go wider again. that way the diemater or length of the stinger has no influence anymore.

Image
I cannot view this photo. Maybe it would have made the explanation clear. I do understand now. Thanks, again!

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Smoker
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Re: RZ350 Super Motard

#966 Post by Smoker » Fri May 11, 2018 10:51 am

MK wrote:Don't use that 90 deg bend at the belly. Looks like moto cross pipes from the 70's.

The radius must be much smoother as the exhaust gas won't like going round sharp corners. Should look like the RSK 500's
https://pbs.twimg.com/media/C3A7PkuXAAEUYJ4?format=jpg" onclick="window.open(this.href);return false;
I was looking for my SXV parts fiche and found your info on how to fabricate a two-stroke exhaust.

I'll read it as soon as I can. I don't think I can fabricate the exhausts myself, but it will help me understand how to design the pipes for this bike.

I'm afraid, because of clearance issues, I may not be able to use an ideal design or shape or size. I may have to design the pipe so that it fits the bike, and suffer the horsepower consequences. Hopefully, with info from you and Jan, I can see if there would be a large difference between up-pipes or down-pipes.

Thanks, again! :smt006

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JanBros
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Re: RZ350 Super Motard

#967 Post by JanBros » Fri May 11, 2018 7:10 pm

Smoker wrote:
JanBros wrote:best is to let the baffle end in the stinger with a nozzle, and then go wider again. that way the diemater or length of the stinger has no influence anymore.

Image
I cannot view this photo. Maybe it would have made the explanation clear. I do understand now. Thanks, again!
don't know if you need to be logged in on that forum to view pics. here is the link : https://www.kiwibiker.co.nz/forums/show ... er/page833" onclick="window.open(this.href);return false;
if it runs, you can race it !

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Smoker
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Re: RZ350 Super Motard

#968 Post by Smoker » Sun May 13, 2018 6:54 am

JanBros wrote:don't know if you need to be logged in on that forum to view pics. here is the link : https://www.kiwibiker.co.nz/forums/show ... er/page833" onclick="window.open(this.href);return false;
Thanks, Jan. I can't see the pics, but there is a lot of good info to read.

Started working on the gearchange lever, brake pedal, and footpegs, to make sure there are no clearance issues with the mockup downpipes.

Gearchange lever may be a problem, not sure yet. The gearchange shaft is pretty far forward. Looks like the custom lever might be very short. Might not have much leverage.

Spent a ridiculous amount of time looking for footpegs. I already bought footpegs, but I would need to make custom adapters. Plus, I think they would be good for another project. Not many pegs made to fit the SXV. Can modify CRF pegs to fit, but can mess up the finish. Ended up ordering Pivot Pegz. They're trick, and polished stainless, so I can have them gold TiN coated like the hardware.

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Smoker
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Re: RZ350 Super Motard

#969 Post by Smoker » Sun May 20, 2018 12:59 pm

Hard to get a good pic, but the new pegs look great on the bike.

They are extra wide, very thick, and unfortunately HEAVY.

I'm happy, though.

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Smoker
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Re: RZ350 Super Motard

#970 Post by Smoker » Fri Jun 01, 2018 3:18 am

Been searching exhaust couplings because the pipes wrap around the frame (up-pipes or down-pipes), and the stingers will need to be separate from the pipes.

These are the coolest exhaust couplings I've found, so far. They aren't made for 1 inch pipes, so they would have to be custom made.

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two-stroke-brit
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Re: RZ350 Super Motard

#971 Post by two-stroke-brit » Wed Jun 06, 2018 1:46 pm

is the set screw an anti vibration aid ?
350LC,Athena 392 big bore,stock porting,swiss cheese air box,stock reeds,spec11 pipes.(now TSA big bore pipes)
She might not be pretty but she will always be a fun ride


1982 YAMA RD350LC
2004 BMW R1150RT
1989 FZR1000
1994 FZR1000

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Smoker
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Re: RZ350 Super Motard

#972 Post by Smoker » Wed Jun 06, 2018 3:45 pm

two-stroke-brit wrote:is the set screw an anti vibration aid ?
Still vibrates, but the connection won't come loose. :smt023

evan_calgary
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Re: RZ350 Super Motard

#973 Post by evan_calgary » Thu Jun 07, 2018 12:01 pm

Very cool like usual! I like the footpegs!

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Smoker
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Re: RZ350 Super Motard

#974 Post by Smoker » Mon Jun 18, 2018 8:35 am

I like using anodized aluminum washers with titanium bolts, but remembered there are a few places I'd rather not.

Will be changing out the aluminum washers for titanium washers on the motor mounts, torque bars, rear sprocket and brake rotors.

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Smoker
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Re: RZ350 Super Motard

#975 Post by Smoker » Sun Jun 24, 2018 3:42 pm

Would like to make parts #2 and #7 out of .090" titanium sheet (2 sets).

They hold the kickstand springs to the kickstand and frame. Would look cool polished and gold TiN coated like the other hardware.

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The holes are approx. 10mm and 6mm, for size reference. I could cut them by hand, but will look much better cut by machine.

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