oh god, what did i do

P_J · Nearly there... Joined: 24 Nov 2002 Karma :

After d!cking about yesterday with the air box and carb etc and re-attatching some bits that honda thought to leave dangling for me (1100mile on, only just discovered), i have found that my NSR has lost its ... umff.

From Idle (about 1.5k), whip the throttle back and it kinda, just... farts at me. Before it used to react like it should, throttle back and revs would rise accordingly.

If you slowly raise the revs to about 5/6k then whip the throttle back, it does what it should, revs rise quickly.

This has dramaticaly effected the acceleration.

The screws on the right hand side of the carb (as you sit on it), one small, other little bigger with a spring on it. i have adjusted them slightly as the idle was a bit low (bout 1.2k), but this was before i took out the box etc, so this shouldnt have affected anything.

What can i do to get back the accelaration my bike used to have? Anything i took out, i put back as was.
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McJamweasel · BCF Junkie Joined: 22 Mar 2002 Karma :

You adjusted both screws?

Put them back how they were.

Also check that the fuel pipe isn't kinked.
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BCF: Be yourself, just don't be an arse.

P_J · Nearly there... Joined: 24 Nov 2002 Karma :

McJamweasel · BCF Junkie Joined: 22 Mar 2002 Karma :

Piece of advice.

If you don't know what the fuck you're doing then don't fucking try it!
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P_J · Nearly there... Joined: 24 Nov 2002 Karma :

thanks McJam, thats helpful. Sad

Read in the manual, how to adjust idle. Followed the instructions, that fixed the idle problem.

The other problems occurred when i took out the air box to get to the jubilee clip that wasn't attached to the carb+hose to engine. like i said, put everything back, as was.

I would appreciate ideas on how to fix it, if anyone has ideas or the know how, rather than people re-iterating what i already know (if it ain't broke, don't bugger about with it).
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P_J · Nearly there... Joined: 24 Nov 2002 Karma :

Scotty · Scooter Boi Joined: 31 Jul 2002 Karma :

Theres no holes or anything, have you done the jubile clip up correctly,
fixed the airbox tightly etc...
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Regards
Scott

P_J · Nearly there... Joined: 24 Nov 2002 Karma :

Scotty · Scooter Boi Joined: 31 Jul 2002 Karma :

Sounds abit funny like the mixture is running to lean.
What happens if you leave the choke on?

I only ask because if somethings not done up correctly and its letting in more air causing it to run lean this won't help at low revs. Also will cause loss of sucktion to draw petrol through.
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Regards
Scott

P_J · Nearly there... Joined: 24 Nov 2002 Karma :

I flogged it up and down the bypass and tried to fiddle while i was out on the road.

Actually pulled the choke out while was idling and it chugged and stalled. Starts first click though, but that could just be because it was warm.
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TGE125NSR · Banned Joined: 07 Jul 2003 Karma :

You have messed with the pilot air screw.screw it all the way in and out 1.5 turns

If it isn't broke, then don't fix it! Razz

P_J · Nearly there... Joined: 24 Nov 2002 Karma :

Kickstart · The Oracle Joined: 04 Feb 2002 Karma :

Hi

The pilot screw adjusts the idle mixture strength. By the sound of it your bike is running too lean on that adjuster. According to the manual the pilot screw on a late nsr should be 2.5 turns out. The pilot screw is the small screw.

All the best

Keith
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cagiva gezzer · World Chat Champion Joined: 17 Mar 2003 Karma :

piolot screw = idle circuit adjuster.

Face it, you dont have a clue what you are doing. You messed with it, take it to a dealer/dyno and pay up!

Sorry, but even with the best will in the world, the people who know on this site wont be able to help without seeing it and poking it.

You did oil the filter?
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"because one stroke isnt enough and four strokes waste two"

P_J · Nearly there... Joined: 24 Nov 2002 Karma :

P_J · Nearly there... Joined: 24 Nov 2002 Karma :

oh, by the way, i fixed it!
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Lee · Trackday Trickster Joined: 02 Jul 2003 Karma :

cagiva gezzer · World Chat Champion Joined: 17 Mar 2003 Karma :

Its true though.

Read some books. Start with old car books which are nice and simple to get the hang of engines. Move onto bike books or workshop manuals. Then tuning books.

Read "zen and the art of motorcycle mantiance" and see what sort of person you are. Some people are just not ment to work on engines.

I agree, you only learn by doing it yourself, but know your limits.
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"because one stroke isnt enough and four strokes waste two"