My mc18 has always been very smokey during start up and well all the time (at idle). Andy I was wondering if you ever got around to replacing the crank seals on your NSR and did it make a diffrence in the smoke out put. I don't really mind leaving a light in a big cloud of smoke. I have never had any gas in the gear box and have never noticed the gearbox oil level drop. I had the jetting set and have the smallest pilot jet I could find installed. _________________
I have a rebuilt crank in my 21 now, but we went right through the motor at the same time, so I can't say what effect just the seals would have made.
What's the motor like once warmed up to normal operating temperature? I've seen a couple of 18's that seem to pump the smoke out when cold, as if the pump over-oils slightly until the solenoid switches. I take it the pump is set correctly?
Some oils can smoke more than others too. I find the Rockoil we use seems to smoke a little less than some of the others. _________________ Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
When it warms up it gets alittle better but if you sit at a light or stop and go it gets smokey again. Pump is not a problem as it is premix I run 32-1 . I have tried a couple of diffrent oils Motul low smoke cuts down on the smoke some. I guess it's just the way it is I don't ride it very often. So maybe the gas and oil settle in the bottom of motor and it takes a while for it to burn away. _________________
In my experience pre-mix smokes like crazy pretty much all the time unless it's being hammered.
All the bikes at the races chuck the stuff out like it's going out of fashion (as well it is). _________________ Please do not PM me technical questions, if you can't find it on the Forum start a thread
Valve stem seals gone I think... _________________ MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball
I use Motul 710 and it smokes like crazy on start up.... Once warm it doesn't smoke at all (oil injected)....
Now on my RMX though, I use syn. oil at 50:1 and it smokes a lot all the time... So maybe it is a premix thing ?????
If it's not fouling plugs it can't be to bad, right? _________________ MC21
04 NSR50R
93 CBR F2
98 CBR F3 track bike
95 VFR750
89 FL400R Pilot
90 FZR 4/600
The pump delivers something silly like 100:1 at idle, so it's no surprise that if it's coming in at 30:1 ish then it'll probably smoke.
If I'm sitting at the lights idling it'll start to smoke, but once I'm away and have hooked a couple of cogs it'll clear up.
Take a look at the GP bikes. During the race there's not a wisp of smoke as they're so finely set up, but on the slow down lap quite a few will be puffing smoke.
Funny you should mention this. My -21 only smokes from the top cylinder at low rpm; then as you rev it it will smoke from both cylinders; then it doesn't smoke from either cylinder. I figured the rings might just be seating in. I still have the injection. _________________ james
Its not how fast you go...Its how you go fast.
MC21 Rothmans
RS250
RC31
CRF250X
748R
Porsche (many)
http://members.rennlist.com/j911brick/rennlist3_002.htm
I don't know how good is your bike. When I bought my NSR it had the same problem. I have done everything possible, and tried all Oils available.
The problem was in the exhaust pipe. Finally I have dismantled it, and one will not believe what was inside. It stopped smoking and it start to speed up better as well.
May be you should try this. However, note, that my nsr was in the garage for more then three years when I bough it.
Try, may be it will help. _________________ Burn the soil, not the soul.
I don't know how good is your bike. When I bought my NSR it had the same problem. I have done everything possible, and tried all Oils available.
The problem was in the exhaust pipe. Finally I have dismantled it, and one will not believe what was inside. It stopped smoking and it start to speed up better as well.
May be you should try this. However, note, that my nsr was in the garage for more then three years when I bough it.
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum You cannot attach files in this forum You cannot download files in this forum
