On the RD350 tach and speedo that resting position is a few mm behind the pin.
Something between 2 and 5 mm should be in the ballpark.
It can be calibrated later with your smartphone and a GPS speedo app.
For the rpm calibration you could get a cheap tach from Alibaba and hook that up.
Search found 817 matches
- Sun Mar 31, 2024 12:59 pm
- Forum: Electrical & Wiring
- Topic: Instrument needle resting position
- Replies: 4
- Views: 93
- Sun Mar 31, 2024 12:53 pm
- Forum: Custom Projects/Restoration
- Topic: RZ350 Super Motard
- Replies: 1296
- Views: 370374
Re: RZ350 Super Motard
That gap will easily weld up.
Don't worry and get the torch out.
Don't worry and get the torch out.
- Sat Mar 30, 2024 2:07 pm
- Forum: Electrical & Wiring
- Topic: Instrument needle resting position
- Replies: 4
- Views: 93
Re: Instrument needle resting position
Slightly bend the needle over the resting pin. Then mark the equilibrium position.
This is where you put the needle back on after repairs/resto.
This is where you put the needle back on after repairs/resto.
- Sat Mar 30, 2024 2:05 pm
- Forum: Custom Projects/Restoration
- Topic: RZ350 Super Motard
- Replies: 1296
- Views: 370374
Re: RZ350 Super Motard
I guess that's a problem of all old fashioned "Forums" where I'm active.
It's an old man's thing that has moved on to FB groups.
Younger folk prefers other platforms like Tiktok , Instagram , ...
It's an old man's thing that has moved on to FB groups.
Younger folk prefers other platforms like Tiktok , Instagram , ...
- Sun Mar 24, 2024 4:53 pm
- Forum: Chassis, Brakes & Suspension
- Topic: RD350B
- Replies: 2
- Views: 90
Re: RD350B
I'd throw in using Koso RX1 / 2 units as they come close to what you're after: https://www.caferacerwebshop.com/de/rx2nr-snelheidsmeter-toerenteller-en-schakel-alarm.html They come with a manual and you can get several additional sensors like CHT https://www.caferacerwebshop.com/de/10mm-cilinderkop-...
- Sat Mar 16, 2024 7:52 am
- Forum: For Sale
- Topic: RZ350 adjustable power valve contoller
- Replies: 12
- Views: 835
Re: RZ350 adjustable power valve contoller
Here's an example on how you determine the optimal open/close rpm. Simulate or dyno with PV closed, then with PV open. Usually you'd pick the point where performance starts to drop with PV closed and have it fully open a few 100 rpm before top performance. Voila, that's your transition rpms to start...
- Thu Mar 07, 2024 5:30 am
- Forum: For Sale
- Topic: RZ350 adjustable power valve contoller
- Replies: 12
- Views: 835
Re: RZ350 adjustable power valve contoller
FYI: If you have such a device, try curve 14 (6000-8550) for stock'ish engines. That's been confirmed by quite a lot people to be the best compromise. For higher revving engines (modified+pipes) , something like 6k - 9-9 5 k was more appropriate. If you want to do this on your own, here's the how-to...
- Mon Feb 12, 2024 4:24 pm
- Forum: Electrical & Wiring
- Topic: Gauges question.
- Replies: 2
- Views: 235
Re: Gauges question.
I'd have them laser cut from foam plate with the right thickness. Check out for maker projects around your place. In our town they'd offer such services here: https://makerspace-bs.de/lasercutter/ As an alternative there's always professional laser cutting services like these guys: https://www.cutwo...
- Sun Jan 28, 2024 5:07 pm
- Forum: Custom Projects - Other Bikes
- Topic: Pitbike Supermoto
- Replies: 5
- Views: 688
Re: Pitbike Supermoto
Thanks mate, glad you like it :-) I wouldn't call that racing, it's only track days with like-minded people. In some cases even two-stroke meetings. Unfortunately age is already striking. In the last years I lost some seconds on my favorite Kart track If you haven't already found it, check out some ...
- Sat Jan 27, 2024 5:00 pm
- Forum: Engines
- Topic: +4mm crank gains
- Replies: 30
- Views: 2137
Re: +4mm crank gains
The dip at 8.5k could be cured a bit by more ignition advance in that range.
And fiddling a bit with the PV fully open rpm. Try 9 - 9.25 k.
And fiddling a bit with the PV fully open rpm. Try 9 - 9.25 k.
- Sat Jan 27, 2024 4:55 pm
- Forum: Custom Projects - Other Bikes
- Topic: Pitbike Supermoto
- Replies: 5
- Views: 688
Re: Pitbike Supermoto
It turned out to be a super fun ride. Especially indoors during winter time. I do track days on a monthly base then. For outdoors I upgraded the engine to a 4 valve 155cc Daytona but it's still kinda small breasted. https://i.postimg.cc/9FPRt5D5/IMG-6210.jpg https://i.postimg.cc/rsNVWTQf/IMG-2827.jpg
- Tue Nov 28, 2023 7:12 am
- Forum: Engines
- Topic: +4mm crank gains
- Replies: 30
- Views: 2137
Re: +4mm crank gains
I've been busy with other important things in live, so the 2016 version would be still available, if it weren't for my printing shop closing down a month ago. Honestly I was too lazy to source another one, yet. The 500 manual is available for download here: https://www.rd350lc.de/downloads/MK-Dokume...
- Thu Nov 23, 2023 11:22 am
- Forum: Engines
- Topic: +4 crank on a mildly modified pv engine
- Replies: 16
- Views: 1900
Re: +4 crank on a mildly modified pv engine
I went the easiest path and simple had the head machined some 0.5-1 mm bigger than the bore size.
That saved dowel pins but still avoided piston to head collision.
That saved dowel pins but still avoided piston to head collision.
- Tue Nov 21, 2023 9:04 am
- Forum: Engines
- Topic: +4mm crank gains
- Replies: 30
- Views: 2137
Re: +4mm crank gains
- Enlange exhaust port down -2mm to match piston top at BDC (very small gains, might not be worth it) - Keep transfer ports as they are (I cant find any good gains modifying them) I once ran engmod sims that showed around 1.5-2 HP gains when matching the lower transfer port edges to the new piston ...
- Thu Nov 16, 2023 5:25 pm
- Forum: Engines
- Topic: +4mm crank gains
- Replies: 30
- Views: 2137
Re: +4mm crank gains
Try something like 16-18 deg @ 9000 and fully open PV @ 8k