Tuning
- Top-shaggy
- Premix Junkie
- Posts: 1966
- Joined: Mon Oct 31, 2011 11:09 pm
- Location: Derbyshire
AR125 disk information here
http://diffrentstrokers.com/phpBB2/view ... f144d2f61e
Sorry couldnt find where i put it on the KR site so link to a different forum but may still be worth a look.
Something like closing the inlet (trailing edge) at 75-85deg ATDC should make a big difference. TSI on this forum may be worth a PM on this one !
http://diffrentstrokers.com/phpBB2/view ... f144d2f61e
Sorry couldnt find where i put it on the KR site so link to a different forum but may still be worth a look.
Something like closing the inlet (trailing edge) at 75-85deg ATDC should make a big difference. TSI on this forum may be worth a PM on this one !
If it takes more than 2strokes then your just playing at it..
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- Heavy Smoker
- Posts: 342
- Joined: Mon Jul 30, 2007 8:18 pm
- Location: Germany
Re: Tuning
Hi2stroke wrote: ..... It has NOTHING under 3000rpm.....
Any advice will be helpful
i know the problem.
this is the solution:
regards
Dirk
KR-1S 1990
RG500 1987
RGV 250 1992
TZR250 (2MA) 1987
RG500 1987
RGV 250 1992
TZR250 (2MA) 1987
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- Premix Junkie
- Posts: 1087
- Joined: Thu Jul 27, 2006 9:43 am
- Location: Yorkshire
- Contact:
Manual says :Luders wrote:What were the carb settings from factory?
Main Jet 137.5 (range 132.5-142.5)
Main Air Jet 1.5
Needle Jet O - 6
Jet Needle 5DH2-4
Needle Clip Position 4
Pilot Jet 35
Starter Jet 70
Fuel Level 4 +/- 1 mm
Float Height 21 +/- 2 mm
Kawasaki KR250 Tandem Twin (x4) & KS-II 80,
Yamaha RD350LC,
Suzuki GSX-R750RK & RB50 Gag.
Yamaha RD350LC,
Suzuki GSX-R750RK & RB50 Gag.
- ScottaKR
- Premix Junkie
- Posts: 1521
- Joined: Fri Aug 10, 2007 2:52 pm
- Location: Australia
I would've thought that too till I read this...Luders wrote:I would always advise sticking with stock jetting. Glad you''re happier with the power improvement though.
Now I understand the reason it was so flat down low in the first place.2stroke wrote:Main 150 after barrels ported.
KR250 Tandem Twin (Naked)
KR1 Red/White
KR1S Track Bike (has been put on hold for now)
ZXR750 H1 (Winter project)
KR1 Red/White
KR1S Track Bike (has been put on hold for now)
ZXR750 H1 (Winter project)
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- Light Smoker
- Posts: 44
- Joined: Tue Jul 24, 2012 8:54 pm
- Location: sydney
What are you on about?ScottaKR wrote:I would've thought that too till I read this...Luders wrote:I would always advise sticking with stock jetting. Glad you''re happier with the power improvement though.Now I understand the reason it was so flat down low in the first place.2stroke wrote:Main 150 after barrels ported.
We bought this bike with no compression and needing a rebuild. Also no bottom end power.
So we rebuilt in,
Porting the barrels not for top end only but right through the rev range. Which it has done.
O-ring the heads to give higher compression which also improves bottom end.
Bike did improve and goes great.
But comments like yours makes me wonder why I bothered sharing this on here!!!
- ScottaKR
- Premix Junkie
- Posts: 1521
- Joined: Fri Aug 10, 2007 2:52 pm
- Location: Australia
I'm sorry if you took what I said the wrong way, but it was the first time youd even mentioned porting the barrels, let alone how they had been ported. More often than not people will port for massive top end, which is what I had wrongly assumed, but you hadn't really given us much to go on.2stroke wrote:What are you on about?ScottaKR wrote:I would've thought that too till I read this...Luders wrote:I would always advise sticking with stock jetting. Glad you''re happier with the power improvement though.Now I understand the reason it was so flat down low in the first place.2stroke wrote:Main 150 after barrels ported.
We bought this bike with no compression and needing a rebuild. Also no bottom end power.
So we rebuilt in,
Porting the barrels not for top end only but right through the rev range. Which it has done.
O-ring the heads to give higher compression which also improves bottom end.
Bike did improve and goes great.
But comments like yours makes me wonder why I bothered sharing this on here!!!
KR250 Tandem Twin (Naked)
KR1 Red/White
KR1S Track Bike (has been put on hold for now)
ZXR750 H1 (Winter project)
KR1 Red/White
KR1S Track Bike (has been put on hold for now)
ZXR750 H1 (Winter project)