NSR250R mc21 HELP

[hurricane_r]

just brought a mc21 dry clutch rothmans nsr

just wondering if anyone knows where the oil adjustment screws are

i.e more / less

[bimotabob]

Hi

Never heard of "oil adjustment screws"
Which oil?
Is yours the SP or SE model?
One of them had special light rims as standard - quite rare.

Regards

[xwhatsit]

He means the lubrication rate screws on the oil pump, two-stroke and all that (could you imagine having to put pre-mix in an NSR? What a bitch!).

Do they have facility for adjustment? I would've thought Honda of all people would have that set up automatically.

[Tim 39]

most two strokes have adjustment screws on the oil pump. I'm not sure specificly because my NSR was on premix

[bimotabob]

Hi
I have never seen "oil adjustment screws" on a 2 stroke oil pump and I have seen plenty but not a NSR oil pump up close.
I suggest to you that there is no such thing - they have a predetermined flow rate.
They usually have an air bleed screw and cable adjustment ability only.
Also they have marks to allow synchronising to the throttle cable(s)
Make sure you use a oil injection type 2 stroke oil as they have a dispersant
to control the viscosity.

Regards

[roadracingoldfart]

I cant say for sure but the NSRs i used to work on had a cable to the oil pump and the ratio was done there.
If not then im fucked if i know but maybe get a manual !!!! .

[plutoniumman]

http://tech.nsr-world.com/

Go here. You adjust it by tightening or loosening the cable. Though for me the marks in the diagram seemed wrong.