Tuning

[Top-shaggy]

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 !

[2stroke]

Yeah something to play with

Thanks !

[dirk]

..... It has NOTHING under 3000rpm.....

Any advice will be helpful

Hi

i know the problem.
this is the solution:




regards
Dirk

[2stroke]

Nice one dirk

To anyone who maybe interested.
Our result for carby setting was,
25 pilot
150 main
And needle full rich.

Works fine better bottom end power.
Seems to be harder to start but

[Luders]

Dirk's words of wisdom did spring to my mind before you mentioned having to slip the clutch.

What were your jetting settings before?

[2stroke]

Pilot jet was 45
Main 150 after barrels ported.
Needle in the middle

[Luders]

What were the carb settings from factory?

[StrokerBoy]

What were the carb settings from factory?

Manual says :

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

[2stroke]

Have a 150 main and looking at the plug it can still go larger.
Very nice top end power now. Pulls like a 250 should

[Luders]

I would always advise sticking with stock jetting. Glad you''re happier with the power improvement though.

[ScottaKR]

I would always advise sticking with stock jetting. Glad you''re happier with the power improvement though.

I would've thought that too till I read this...

Main 150 after barrels ported.

Now I understand the reason it was so flat down low in the first place.

[2stroke]

I would always advise sticking with stock jetting. Glad you''re happier with the power improvement though.

I would've thought that too till I read this...

Main 150 after barrels ported.

Now I understand the reason it was so flat down low in the first place.

What are you on about?

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]

I would always advise sticking with stock jetting. Glad you''re happier with the power improvement though.

I would've thought that too till I read this...

Main 150 after barrels ported.

Now I understand the reason it was so flat down low in the first place.

What are you on about?

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!!!

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]

Cool. Just don't judge before you know the facts.

[pepsi]

Nice one dirk

To anyone who maybe interested.
Our result for carby setting was,
25 pilot
150 main
And needle full rich.

Works fine better bottom end power.
Seems to be harder to start but

I am trying to remove the bottom end bog, and I have lowered the needle from stock, to the third groove,( will cause more lean conditions in low rpm.) will report back ASAP.