nsr125 help

mad73

not sure wot happened with the pic but the link works
do have side fairings wont put them on till I no he aint gona drop it

Calum

@mad73 said:

not sure wot happened with the pic but the link works
do have side fairings wont put them on till I no he aint gona drop it

Please read:

http://192.168.0.2/topic/5/embedding-images

If you're still having problems open up another thread.

mad73

read it, think ive got it now will open a new thread and see if I can get it right lol

Calum

@mad73 you are not the only one. A lot of people seem confused. Adding tags and what not. The internets moved on since the 90's lol. Just paste the location of the image and node will do the rest.

mad73

ok son went out on the nsr the other night and said its not running right so I took it for a spin and its hard to pull away on it its bogging down quite a bit quite dangerous pulling out of junctions but once moving all seems good, also fork sill is leaking which aint much of a prob I changed them a couple of months ago must not of put it in right as the other side is good
any one got any ideas wot to look for with the bogging jets are correct

Calum

Sounds like way too much air. Tell me does it sound quite deep when you rev it.

In neutral after its warm, when you blip the throttle does it respond instantly.

Like this numpty here

https://youtu.be/MC5sf4Cx4o4

Says aww 99 octane fuel killed my bike. Uhmm no mate, you can clearly here the snorkel is not in the air box. Clear as day. I don't understand why people remove them lol

mad73

@Carlosrexx said:

I had a 'full power' NSR foxeye j22 j think it was. Although I never had any problems like yours, the powervalve would stop working all the time and would retard the engine. Sounds similar to what you're experiencing, I just ended up pinning the valve wide open and it never gave me an issue again.

I'm not saying this is your solution, but it would be something I would take a look at regarding the running issues. With regards to PSI and compression, definitely check everything is bolted down to correct torque settings. Double check everything, make sure the carb is installed tight, no air leaks, proper float movement and clear jets. I know it's all simple stuff but sometimes stuff gets overlooked and it's the simplest thing that's stopping the bike from working.

http://i1227.photobucket.com/albums/ee433/RV02-Sachs/NSR 125/ADA2BEBF-043A-46C8-9B71-7A61B3F637ED.jpg

how would I pin open the power valve ? might try this

Calum

@mad73 pining the valve open will make things much worse.

If the bike is derestricted then it will want a fully operational powervalve

mad73

yeah fully derestricted its just pulling away where it seems to have a prob

mad73

@Calum a little bit like that , will have to try and get a video up of it , have to slip the clutch to get it to pull then seems fine , hasn't got great response when revving from idle ,

Calum

Sounds to me like too much air, or the air flow is stalling.

mad73

How would I sort that ?

Calum

Make sure the snorkel is in there and that there are no sharp turns in the inlet Tracy. It's the bend into the air box that stalls air flow. Hence why snorkels are a must.

mad73

@Calum ok will have a play tomorrow if it aint raining , another reason why I need to pull my finger out and get the man cave built , also snorkel is that the breather pipe

mad73

ok had another play today got it running a little better screwed the choke cable right in which made it pull off better still a little lumpy at about 20 to 30 mph gona try a new air filter which might help , tried running with no filter just the box but that didn't help made it worse at least it can pull away now will have to try more once its run in , a few pics of the air box set up and the plug , does the plug look normal ?
http://i286.photobucket.com/albums/ll115/mad73_2008/IMG_1916_zpsyseldbba.jpg
http://i286.photobucket.com/albums/ll115/mad73_2008/IMG_1914_zpszf1bbe4c.jpg
http://i286.photobucket.com/albums/ll115/mad73_2008/IMG_1913_zpssf9qakfq.jpg
http://i286.photobucket.com/albums/ll115/mad73_2008/IMG_1911_zpspu4mopeh.jpg
http://i286.photobucket.com/albums/ll115/mad73_2008/IMG_1910_zpsl56toq0d.jpg
http://i286.photobucket.com/albums/ll115/mad73_2008/IMG_1908_zpsmahlhzx3.jpg

mad73

https://www.youtube.com/watch?v=tOVzRCxz4sw
how it runs now

Calum

Cool, snorkel is there. If taking The filtration out makes it worse, then it's getting too much air and not enough fuel. If you max out the idle screw movement then you will need to go up a jet size.

I have posted a carb tuning tutorial on this forum that will help sort it.

If it runs fine with wide open throttle, then you can leave the main jet well alone.

mad73

I shall have a read of that , the jets are whats recommended for full power nsr, once its run in il take for another spin to see how it run coz asking my son I might as well ask my dog , dog probs knows more and would get a clearer answer lol

Calum

Yeah mate. Start with what's recommended and work from there.

Remember fuel quality, air temperature and the quality of the components will play it's own part in jetting. Highly strung two strokes are more effected by these changes than less tuned bikes.

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nsr125 help