!!!PLeAsE HeLp!!!!!

[Desmogod]

Originally Posted by Alessio

i took the bike to honda, and their verdict was that i had blown my power valve... nice to know that they always looking to make a quick buck out of you..

You're from SA right?
You should be used to it by now surely?
Always some black cunt around trying to steal your krugerrands.

[Dominic]

i was also thinking the clutch straight away

[Falcore]

my 12 does the same thing in the wet, would it be the clutch too hehe

[Jamathi]

2 stroke topics are for helping each other on 2 stroke matters and not for "shittin in" by one eyed diesel operators
So be helpfull and otherwise bugger off to the other whored out area's

[Alessio]

Got another problem with the bitch... i never really had the chance to open her up yet and to try and see what top speed i could get. So yesterday was my day, hit the highway and toped out at 160kmh. wait for it..... on a downhill!! At that highly annoying point of limiting out at 160 i looked at my gauges and noticed that my revs will not go further than 9000. I just thought i would come try my luck with the masters (you) cing as you fixed my last problem.

thanks and safe riding

[monsta]

it may be that you've got to a point that you are pushing that much wind that your bike dosn't have the power to push through it....

[Alessio]

no, this bikes model is good for 190 kmh with a chubby guy riding and 200kmh with a lighter guy on.

[monsta]

so... its reving higher in all gears (whats it rev to?) then you hit top and it only goes to 9000?

[Alessio]

ok my redline starts at 11 000 rpm and ends at 13 000rpm.. the problem with my bike is that is doesnt rev past 9000rpm in anygear.

[Jamathi]

Rings worn or broken compression test first if no good then have a look by, taking head of and feel/look for scoring. if scored/worn whatever -- (FIX it!)
Also have look at ignition timing/sparkplugs and gummed up carbies, mainjet gummed up/shit blocking jet/ slides out of sink.

[thro]

given that honda said the power valve was fucked... and 9k is probably around about where its supposed to open (probably earlier, but it might rev a bit past where its supposed to open)... guess what?

power valve could actually be fucked

that said, i doubt you'll get 200 out of an NSR150.

[Stratos]

190 out of an NSR150 ... I call BS. My RS125 could hit 166. I could nip NSR150's on my RS125. Possibly after market sprockets with smaller front larger rear would drive your Vmax up, but acceleration would suffer.

I know earlier RS125's with the cable driven rev counter would read 180-190, massive read error due to instruments being out of calibration. The real Vmax was still around the 165 mark. Its probably the same with your NSR, provided its still cable driven.

And yeah, if your PV aint opening properly, your motor wont rev fully. Its restricting the size of your exhaust port and the velocity the spent gases can exit the combustion chamber. If the gas cant escape quickly enough, the chamber cant displace the burnt mixture fast enough whilst forcing an unburnt mix in, thus limiting the revs the motor can spin at. Effectively like a natural, non computer controlled, rev limiter.

Your PV may just be jammed closed because its gummed up, or there could be a deeper problem. My suggestion. Pull the thing out, clean it and the port and then see what happens. I don't believe the NSR150 would have a mulitstage valve, so if its not opening at all, id be looking for, in this step, loose connectors in the PV system, mechanical and electrical, a dodgey solenoid that opens and closes the valve, or a busted valve controller.

If these are all fine, then follow what Jamathi said. If its the problem Jamathi diagnosed, fix it quick, otherwise your motor will probably go bang.

[Hostilemonk]

"The actual top speed is much more closer to 180km/h. These were the comments of the test rider." nsr150sp This is for the SP nodel NOT the RR model which is slower.

If its doing 160kph, flat out, downhill, with no headwind I'd suggest it maybe needs a tuneup. If its done a lot of Km or hard Km's then may need a top end renewal (rings and possible honing the barrel. This is relatively simple and you could do it yourself if you have the tools.

But a general tune up seems in order first. buy a manual and do it yourself to save Rand.

[Stratos]

My bad, didn't distinguish between the SP and RR.

[Alessio]

refering back to strato's comment about the calibration error's due to the cable it could be possible... the top-speeds given to me wer from guys who own both an sp and rr. the rr said he got 190kmh and the sp owner said he got 200. So the verdict is that is that i run diagnostics and clean the majour components and if that all doesnt work then replace the power valve?

[Bruce Wayne]

luister sonny, net neem die bloedig ding tot die honda dealership en laat hulle herstel dit alreeds ...

[Stratos]

No no. Check the powervalve out 1st.

Clean it 1st. Then check all connections related to it. Trouble shooting 101, its always the stupidest little thing disconnected that has caused the failure. If thats ok, then clean your carb out. Be wary of any pilot air hose lines that could have come off, although these really are only of concern at lower RPM's. Compressed air and carbie cleaner are you friend. If that doesn't work, take the exhaust off and check the port it not blocked or restricted. It would pay to clean the expansion chamber out too. Draino is good for this.

If that doesn't fix the problem, then its head off time to check the ring clearances and for any blow by. Feel the inside of the barrel for any scoring. Actually, these last sections would be better explained by Jamathi.

My experience ends at the external parts of the motor, im still learning how to 'read' the inside of the motor properly.

And invest in a torque wrench!