Hi All!
Just bought myself a NSR250 MC16 (i think) tonight! I am very new to bikes, have always been a car guy but decided i needed to try something new and for some reason have become very intrigued in doing a bike project, i think its also coupled with that the car projects \are just really really expensive and being a student budget was just not cutting it!

well here she is,


looks in relatively good nick, the bike has apparently been standing for the last 2-3 years..apparently big end bearings have gone..
my plan is to do a total strip and a total complete rebuild! Do have plans for mod work but will have to figure that all out with regard to budget/timing of what work can be done when (e.g. what work must be done while the motor is open and apart) and what work can be done at a later stage that is more "external" modding, swap on, swap off instead of opening the motor again to do mod work.

back hweel seems to be "locked" it did start turning alittle earlier when we were moving it but then is locked up again.

some more photos (excuse the spiderwebs, these were taken at the original owners house the first time i went to look at it)








will get the fairings off in the morning and get some more photos in!

would love to hear from you guys and get your guidance and opionions during this rebuild.

Welcome!

Interesting disks!

MC16's are great, but I am biased!
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More **** two strokes than you can shake a **** stick at.

hahaha yeah i di a little scanning over the forum last night before i joined, could see you are very much into your mc16 :p, picked up some nice threads of yours though on modding work, mc18 bits etc! have taken down notes hahaha!

im seriously clueless though with how to take this on! I was thinking, fearings off, complete strip down, motor/gbox out and then take it from there? any recomendations? had a peep in the fuel tank, looked like sludge...hopefully it is not rusted inside!

Welcome, I hope you see this project through, it looks like one that needs a lot of TLC and would challenge even the wisest of souls here. Rusted tanks are not a big problem, you can make the rust inert and coat it. When done properly it won't cause any issues.

I'm embarking on a similar magnitude project on a different bike so I think I will be sharing similar frustrations to you.

The forum is a bug source of knowledge, so continue to search and ask as you go.

Good luck!

Where in SA are you situated?
If in Cape Town, you can always take that tank to one of the bike shops that coat tanks on the inside.
I had 2 tanks done recently. They wash it out with acid, neutralize the acid and then put an epoxy coating inside.
It never rusts again...

"it looks like one that needs a lot of TLC and would challenge even the wisest of souls here"
- This worries me hahaha!

staaldraad im in Port Elizabeth! Well im about to go and start the stripping so long!

ok strip going well, both seats off, fuel tank off (came off TOO easy in my opionion, not much really holding it in place), radiator out, 2 x fearing units off, and i have removed the top of the airbox cover..
a little confused now with what to do next? i am assuming get airbox out and then get carbs off? just not to sure how to get this airbox off!




the fearings that covers the motor and goes under the bike seems to have a little ghetto work done on them


Ok 3 things im struggling with/unsure of..
1.) how to remove the airbox off the carbs - then the carbs..
2.) remove the battery (have disconnected terminals already)
3.) Find the transmission oil drain plug! i am looking EVERYWHERE for this! apparently it is clutch side just below the clutch? the only bolt i could find close to that is one that is sneakily tucked in and jsut behind the unit, but if i undo that bolt then oil is going to piss all over the expansion chambers as the space is very tight!

Howzit boet ,

If you are revamping the complete bike you must have at least 15k lying around because hidden costs climb up very quickly .
Get yourself a work bench and then park the boney there . Start at the front of the bike and do 1 thing at a time . If you rush into stripping the complete bike by the time you want to put
things back you will have forgotten how they fit or where they go .
I have seen many nsr's get stripped for restoration and thats where it stops . Not trying to put you off , just be aware that to rebuild that bike will cost more than a running one
and you will never get your money back when you sell it .

I have some mc16 spares you can have if you like , just to help get you going .

cheers , Neal

Thanks for the Heads up neal! definitely learnt from my mistakes with a car project i took on a few years ago which i never finished and sold! the bike is standing in one of our free garagesm quite a big space, have a work bench down there too! for now i was planning on first getting the motor out and having it checked to see what is all damaged, condition etc.. then tackle the motor rebuild, get the brakes, clutch and running gear all in tip top shape, (all bearings, seals, gaskets, pipes, filters etc)..ideally i do want to do a COMPLETE strip rebuild, sand blast the frame if it needs it, as i would like the frame to hae that high polished finished (the beam running between the fuel tank and the fearing)

what mc16 spares do you have? that would be super awesome of you!

Radiator out, upgrade options?


ok managed to get the battery out, figured out that i needed to remove the seat frame support to get the airbox out, so airbox is now out!



something i noticed when taking off fearings earlier today, on the left side of bike (clutch side) this is how it looked once covers came off

is there not meant to be a casing/cover that is meant to be protecting that stuff? i think thats the magneto? and the small sprocket

Yes, there is meant to be a cover there. No biggie not having it though!

Radiator upgrade? A later one will fit, but will take some spacing as the upper mounts for the '21 curved one are further apart. The stock item does work well though!
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More **** two strokes than you can shake a **** stick at.

I would say you are tackling this strip down in the right way as the engine is the most complex bit all the rest is just bolt on stuff. Listen to the guys with the older bikes as they have the experience. I recently did my 1st motor strip down and rebuild and i really enjoyed it and would do it again tomorrow. Just familiarise yourself with the parts as you take them apart, read through all rebuilds on this forum and you should be fine. As neal says it will cost you more than you thought so dont rush into things, take your time and do it right.

2Smoke wrote:Yes, there is meant to be a cover there. No biggie not having it though!

Radiator upgrade? A later one will fit, but will take some spacing as the upper mounts for the '21 curved one are further apart. The stock item does work well though!

does the radiator in my picture look like the standard oem unit?! i woiuldnt know what its meant to look like and wouldnt know if previous owners installed some inferior rubbish thing.

andyo wrote:I would say you are tackling this strip down in the right way as the engine is the most complex bit all the rest is just bolt on stuff. Listen to the guys with the older bikes as they have the experience. I recently did my 1st motor strip down and rebuild and i really enjoyed it and would do it again tomorrow. Just familiarise yourself with the parts as you take them apart, read through all rebuilds on this forum and you should be fine. As neal says it will cost you more than you thought so dont rush into things, take your time and do it right.

Really good to hear that! i am VERY excited about this project and that is exactly why i joined the forum as i want to do this project the right way and to the best it can be without making unneccesary careless mistakes and just costing myself more money.
Any tips with removing the carbs? and also for the life of me does anyone have a photo illustrating where the gearbox oil drain plug is?!?!?!

If you look at the rhs of the motor , look at the oil filler ( plastic screw in fitting ) look below it and you should see an odd size bolt compared to the side cover bolts .

i have an mc21 nota 16 thats why i said you are best getting info from guys with past experience on mc16 but most carbs are held on the same way. At the base of the carb is a rubber collar (best seen looking side on through frame rail) with a metal clip that tightens down on intake area of engine. you will probably need a long reach philips screw driver and access under frame rail from side, obviously one clip on each side of carbs. probaly best to undo throttle and oil pump cables first but do take photos so you know routing when you come to put it all back together.