Ok, so I got a new oil pump yesterday (finally). So, to those who I've been moaning at for an oil pump, its all over since I got one plus tank for the equiv of 5 GBP!

It appears that I selected the wrong pump from the box I was presented with. There is a number "3" stamped on the adj. wheel and the plug on the solenoid wire is white instead of red. Could this maybe be from a MC16?

When I tried to hook it up with the cable from the carb assy. the wheel on the oil pump reaches 100% long before the throttle opens to 100%.

I have the pump body from another pump that was given to me when I bought the bike. It looks the same but has only one feed nipple from the body. The number on that wheel is "5" and is bigger than the one I bought.

I cant remeber what the OEM part's specs are, so can anyone spare some advice or even a photo?

Any help? Just came back after a rather long(ish) cruz with the new oil pump. The bike sounds totally difrent between premix vs. autolube especially at idle. Anyway, I did a plug chop and found the rear cyl. to be in the mark but the front was brighter than tan with heat effects showing all the way down the band onto the sparkplug face. Oooo... too lean I suppose. Its weird since the left pipe (front cyl) would smoke way more than the right pipe (rear cyl.) but the front shows that its running hotter than the rear cyl.

When I did the chop I could hardly touch the rear plug as it came out the spanner but the front was much cooler. Maybe its just cuz the rear isnt in a direct flow of air, but somethings up. I'll have to re-jet everything (MJ) since the setup was optimised for premix.

Any help on the above pump question?

So do you think this is the solution to MC18 idling / oiling up

Must say my MC18 idles perfectly and has never oil a plug up. I used it for almost 2 years to get to work on as well.

If they are oiling plugs up something is wrong with the set up.
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If I have to take the carbs off once more...

Ha! Front float level was set too low = high speed lean condition. Fixed that, the bike ran super good but I almost wrote it all off when I hit a massive pot hole causing me to lose control at 120kph!

The steering went from full lock to full lock at a ridiculously fast pace and kept pinning my hands between the tank and handle. I was preparing to fall and started to wonder what I'm gona do now after Ive fallen. It was VERY close but the bike recoverd by sheer friggin luck and no personal skill at that.

All I can say Rob is, check your oil pump solenoid to see if it IS operating. If its not working anymore the little pin that its supposed to pull back inside the pump body will stay forward. This will cause the pump to flow more oil at idle than is really required. The system ensures good lubrication during cold starts so try not to remove it. Test it with a 6-12 volt DC transformer, I used one from a Scalectrix set.

Alwyn wrote:
The steering went from full lock to full lock at a ridiculously fast pace and kept pinning my hands between the tank and handle. I was preparing to fall and started to wonder what I'm gona do now after Ive fallen. It was VERY close but the bike recoverd by sheer friggin luck and no personal skill at that.

"Tank slapping" had the same thing happen a couple years back.
Nothing more frightening than having the bars go back and forth hitting the stops while doing 50 MPH, not sure how I recovered from that one but I immediatly ordered a steering damper after changing my shorts
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1996 MC28 SE
NSR250R2R


Last edited by p0lariso on Sat Oct 13, 2007 9:20 pm; edited 1 time in total

My mechanic mate came over and after at least 4 hours the problem seems to be sorted.

Gave the bike a thorough check over and in the end turned out to be exectly what Stephen said. Both float heights were well out, especially one for the front pot and after reseting them everything is fine.

Yeah pola, the tank slap syndrome is a bastard. Why does it happen? I got a steering dampner with the bike when I bought it but it was kinda broken, thus kinda useless. At the moment Im machining my own dampner from a chrome pipe and various other pieces to keep oil in and me on top of things!

I wonder how many people actually manage to stay on the bike when this happens? Do many fall off? I would imagine, from an engineering point of view, that a tank slap situation would easily throw you into the tarmac.

Great Rob! Just make sure its not set too high now or else you'll get a top end leaness that mit lead to getting the MJ's bigger and bigger and bigger still with no change noted (oops! )

http://www.youtube.com/watch?v=5AMvAsh_MRM

http://www.youtube.com/watch?v=jUrk90C0bSQ&mode=related&search=
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1996 MC28 SE
NSR250R2R

OOoo... the links you sent resulted in more youtube links pOla. It seems I can be very lucky to have survived that incident