Opinions Honda NSR 125 1989
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I've found the jet upgrade kit dellorto sells, works well with the later barrel like yours will have. 138 main, 65 power and 42 idle jet.
wrote on 26 Apr 2018, 18:46 last edited by@dtr-nsr Alright. She's running mint on idle, just fitted a 140 main. Let's see how she goes.
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wrote on 26 Apr 2018, 18:54 last edited by
Really, it's not even funny how easy it is to start.
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wrote on 26 Apr 2018, 20:16 last edited by
When I was running my nsr richer it was easy to start didn't even need choke. But since running it on leaner jetting it takes abit of tweaking but is loads livelier on the road.
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When I was running my nsr richer it was easy to start didn't even need choke. But since running it on leaner jetting it takes abit of tweaking but is loads livelier on the road.
wrote on 26 Apr 2018, 20:46 last edited by@dtr-nsr does your have a lot of low end power? Mine doesn't, but at 8-12k rpm it moves!
Sixth gear is really not useful. Going 80km/h in sixth gear and twist the throttle nothing happens. Sounds familiar? -
wrote on 26 Apr 2018, 20:55 last edited by
I wouldn't say alot, but it noticeably improved with leaner jetting. Like you say power really comes in about 8krpm. Mine easily pulls to 80mph, you have to take it to the redline in 5th before changing into 6th and be well tucked in for it to pull in 6th I've found.
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I wouldn't say alot, but it noticeably improved with leaner jetting. Like you say power really comes in about 8krpm. Mine easily pulls to 80mph, you have to take it to the redline in 5th before changing into 6th and be well tucked in for it to pull in 6th I've found.
wrote on 26 Apr 2018, 21:00 last edited by@dtr-nsr happy to hear. I didn't redline in 5th at around 120 km/h and when I changed gear I lost everything
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wrote on 26 Apr 2018, 22:15 last edited by
What's the powervalve setting on these?
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wrote on 27 Apr 2018, 06:40 last edited by
@calum said in Opinions Honda NSR 125 1989:
What's the powervalve setting on these?
There open at idle up to 2000rpm, then closes and starts re-opening at about 7500rpm. There's a hi and low mark on the power valve pulley you line up, but I've found like with dt your best checking up the exhaust port, to check there fully open. Some cdi and power valve controllers are restricted though.
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@calum said in Opinions Honda NSR 125 1989:
What's the powervalve setting on these?
There open at idle up to 2000rpm, then closes and starts re-opening at about 7500rpm. There's a hi and low mark on the power valve pulley you line up, but I've found like with dt your best checking up the exhaust port, to check there fully open. Some cdi and power valve controllers are restricted though.
wrote on 27 Apr 2018, 07:19 last edited by@dtr-nsr from what I could see through the exhaust port, the pv didn't seem to be able to be perfectly aligned with the port at all.
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wrote on 27 Apr 2018, 07:50 last edited by
They srvo operate then?
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wrote on 27 Apr 2018, 07:55 last edited by
@calum yes of course.
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@calum yes of course.
wrote on 27 Apr 2018, 08:15 last edited by@irongamer727 Well not of course, Early Aprilia RS 125's and the tuned ones, run pneumatic valves.
KTM EXC's Yamaha YZ's and Kawasakis KIPS run off the gearbox.
So the valve could have been actuated by any of those.
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@irongamer727 Well not of course, Early Aprilia RS 125's and the tuned ones, run pneumatic valves.
KTM EXC's Yamaha YZ's and Kawasakis KIPS run off the gearbox.
So the valve could have been actuated by any of those.
wrote on 27 Apr 2018, 08:21 last edited by Irongamer727@calum Thought you would know for sure. Anyway the pv on the Honda is shit compared to the DT. It's like two different worlds. There is really no low end power on the Honda
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@calum Thought you would know for sure. Anyway the pv on the Honda is shit compared to the DT. It's like two different worlds. There is really no low end power on the Honda
wrote on 27 Apr 2018, 11:40 last edited by@irongamer727 I've never worked on Hondas.
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@irongamer727 I've never worked on Hondas.
wrote on 27 Apr 2018, 13:57 last edited by@calum it's time then
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@calum it's time then
wrote on 27 Apr 2018, 13:59 last edited by@irongamer727 The NSR simply is not as high as spec as the Aprilia is, it frails in comparison.
Now a Honda RS 125 I definitely would love to hand. Shame I don't have 10K lying about the place.
They run their powervalve off the gearbox I believe.
