NSR250 rebuild - 'The ELF Special'

[Neal]

That guy is my mate , the frustrating thing here now is that it is very difficult finding someone that
A: will do the work needed
B : do it properly
C: do it when they say they will etc

I have some crank spares that i can donate to the project .
I was having a chat with our 2 stroke legend Neels and he says that the pins can last 4 rebuilds if looked after . I never asked if it was for race bikes or road bikes .


For me , i am going to be old with a gray beard and still ride my classic nsr at parade meetings when all the kids ask me why does my bike smell so nice

[Wil_K]

It' only money and you can't take it with you. NSRWorld are idiots. Do you need an English workshop manual?

I subcribed to nsr-world to get their online manual, I wasn't going to pay hundreds for paper copy! I know what you mean, they are idiots in some ways. I dont want to knock them too much though, they're still one of the best nsr resource someone like me has.

[Neal]

Tyga performance are your friends !

[imdying]

If you send it down with a rebuild kit, HPE can strip it, Coombes will balance it, and HPE will put it back together again. Won't be cheap, but it'll be better than it left the Honda factory (not hard it appears!). Phil has an MC21 one due, and a rebuild kit sorted out, so he'll probably get it done in a few months.

The NSRWorld subscription manual is a fucking have... it's missing the important stuff. Don't have the full one scanned into the computer yet, but they just upgraded the scanner/printer again from one monster to another, so it should autofeed it through in about an hour or so

[Wil_K]

Well if you do get that manual scanned in, I would love to get a copy.

Looks like I should start tracking down a set of bearings and seals. Neal, thanks for your offer of some crank spares, I may take you up on that. What have you got by the way? If you have crankshaft bits that are in good reusable condition, I'll be happy to buy them off you. And yeah Tyga is great. Haven't bought anything yet, but I will be throwing a few tyga goodies on to the bike, and I'll get a top end rebuild kit from them too.

[Deano]

It was a 1986 NSR 250R that changed my life .....simply awesome bike. Nuff said. Wish I had a late model 2 stroke in my stable...

[Neal]

I have a mc21 crank , mc18 r5 and r2 cranks and a mc16 crank . I was supposed to rebuild a crank but time flew past too quickly . The pins look good on the one crank that has been split . I want to build up a second motor for my 300 so will only use new rods and bearings .

The crank seals you get from Tyga , you modify the 21 seals to fit the old mc18 casings . I have bought seals from a bearing shop but have not tried them yet . I tried my luck with the outer main bearings and the guy says he can get me some when the main shop opens up again .
I have a 21 centre bearing with the seal and will show it to him and see if he can get it .
For the old mc18 crank with the big seal in the centre , the more people i ask the more say i can run a labyrinth seal so i will have one made up too .

Is your bike going to be a track bike or road bike or both ? I like the colour scheme .

[2T Institute]

Twin crank cost $100 to rebuild here (crank pins index properly and return with 0.00mm run out).................

Integral pin cranks are a real PITA , yes NSR world is full of fanboi's and not much else.

[imdying]

You can get a rebuild kit from rgvspares.com.au

[imdying]

It was a 1986 NSR 250R that changed my life .....simply awesome bike. Nuff said. Wish I had a late model 2 stroke in my stable...

86 was the NS250R? If so, incidentally, same here. I would buy one literally tomorrow if old Honda 2 stroke parts weren't such an overpriced pain in the arse.

[Deano]

86 was the NS250R? If so, incidentally, same here. I would buy one literally tomorrow if old Honda 2 stroke parts weren't such an overpriced pain in the arse.

Yeah thats the one. A guy imported a few bikes in a container around 1991 - I got it for $4K - it had 1500kms on the clock.

[Wil_K]

Neal, that's great. Would you be willing to part with your r5k crank? You aren't in NZ though I take it?

I was under the impression that the seals for the r5k would be the same as the 21 and 28. So again good info for me. And the bike will be a road bike, but with a minimal race bike look. Of course I'll also take it to the track for some fun!

[Neal]

Hi , not in NZ , I am moving to Perth in 2 weeks time and most of my stuff is boxed allready . The crank would need to be rebuilt as I would not trust it . Hopefully it has pieces that are ok . I will see what I can find for you .

[Wil_K]

Right, the project is back on track. I finished polishing the frame on Friday. It took a very long time! I'll probably apply some wax to the bare metal parts for protection, rather than clearcoat. It will be cheaper, and easier to touch up. Neal, I'm not ready to do the engine rebuild yet, but I'll keep in touch. It would be great if that crank you have is re-buildable, or if you have other usable crank bits. Let me know once you settle into your move what parts you can dig up.

[Wil_K]

We have a roller. I've painted the wheels too. Just did them with some quality rattle cans. I didn't want to take the tyres off, so if the paint doesn't hold up, I'll get them done in 2K on the next tyre change. Also still hunting for some good used front discs before I break the bank buying new.