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Nsr250 Mc21se Rothnans


paul8899
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Here's part 2 of sorting out the little bits that annoy me

First up is a pair of spacers that hold the top fairing mount.

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The bike came with one missing and as these are visible I made them look all pretty

Next was a pair of spacers that hold the silencers on

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When I took the rear subframe off the nut had corroded so I made a pair of spacers that are tapped and have the hex on the end so they can be tightened. They are also blind so any road crud stays on the outside

There's a couple of other spacers and bits that need making but the list is getting smaller

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I couldn't resist fitting the bits tonight to see how they look, not very exciting to look at though

Here's the exhaust washers and rubbers that needed re-making

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And here's the test fit pictures

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Here's the fitted bracket washers

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I got round to fixing one of the last bits on the chassis today.

I replaced the location peg on the right hand handlebar.

To do this I drilled, tapped and machined a register where the peg had been removed

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I then re-made the peg

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I then used some JB weld to fill in the gaps

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Once this has gone off I'll rub it down and hopefully it won't be too noticeable

Unless I find anything else wrong with the bike the only thing left to fix is the engine :)

 

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  • 2 weeks later...

Look what I picked up today

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It was a bit expensive at £65 and it took a week and a half to get but it's better than the £520 it would of cost for a new crank.

Just have to order some gaskets and seals and then it's all systems go :)

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6 minutes ago, 2T Institue said:

Who did the centre bearing /seal come from if you don't mind me asking?

I got it from the local bearing shop.

It had to be ordered from Germany as there wasn't any in the UK 

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I didn't think those were available or they weren't when I had my NSRs.

i even remember @Stephenrc45 going direct to Koyo with the Koyo serial number and they refused to sell them to him.

the only place they could be found was a guy in Greece had a bunch.

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8 minutes ago, tanuki said:

I didn't think those were available or they weren't when I had my NSRs.

i even remember @Stephenrc45 going direct to Koyo with the Koyo serial number and they refused to sell them to him.

the only place they could be found was a guy in Greece had a bunch.

I did read that the bearings were difficult / near impossible to get hold of which is why I've held off spending anything on the bike until I had one in my hands.

That does sound odd that stevenrc45 couldn't order them from Koyo, might of been that you need to meet certain criterea to be able to order direct.

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26 minutes ago, Stephenrc45 said:

Yes, about 6 or 8 years ago. No problem at all getting them these days. 

I don't suppose you have a set of crank seals and a clear screen laying around do you ?

 

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On 11/10/2016 at 9:52 PM, Dexter21 said:

Astonishingly £1700 would not suffice for an engine rebuild if you were doing this before 2015. consider yourself lucky and yes it is as good as it looks! :D

Parts and knowledge are far more freely available these days, A full engine rebuild; New crank from David Silver spares, a re-plate (Lancourt or Apotec) and new pistons can be had for less than £1,000. The engines are so simple to work on :-)

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1 minute ago, Mellorp said:

Parts and knowledge are far more freely available these days, A full engine rebuild; New crank from David Silver spares, a re-plate (Lancourt or Apotec) and new pistons can be had for less than £1,000. The engines are so simple to work on :-)

I hope they are simple to work on, what's the worst that can happen ?

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10 minutes ago, Mellorp said:

It will only go back together one way. Even a complete numpty with a vapour blaster an engine stand and a hammer could build one and make it look good :-)

I'm in with a chance of making it look good then :)

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36 minutes ago, Mellorp said:

Parts and knowledge are far more freely available these days, A full engine rebuild; New crank from David Silver spares, a re-plate (Lancourt or Apotec) and new pistons can be had for less than £1,000. The engines are so simple to work on :-)

Exactly my point. I would not even bother with a crank rebuild. As far as free information is concerned the NSR250 community was something of a joke in recent years, but this is changing fast.

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Great to see you doing it yourself. So many people send all the bits off to a "restorer" who will unbolt it, send everything off to specialists as they don't actually have the tools themselves, then bolt it back together and charge you for the privilege !!!

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6 minutes ago, Dexter21 said:

Exactly my point. I would not even bother with a crank rebuild. As far as free information is concerned the NSR250 community was something of a joke in recent years, but this is changing fast.

Too true. There is a growing group over on the NSR free forums and a FB group for NSR free information

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Being as I'm starting to run out of bits to clean up I thought I'd have a go at the pgm box.

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I know that no one will ever see it but, well you know how it is :)

All that's left to tart up on the chassis is the footrest hangers, sprocket carrier then I can finally make a start on getting the engine to work properly

On a side note I asked the purchasing department at work to see if they could get the crank bearings but the supplier we use can't get them, seems like the bearings aren't as easy to get after all !

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  • 2 weeks later...

In anticipation of getting the engine out I thought it would be wise to give the shed a bit of a tidy up.

This meant that I had to move the ( soon to be ) mighty nsr outside

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One of the bits I wasn't keen on was the rubber coated footrests, so I fitted a pair from an R1 ( and gave the hangers and pedals a re-paint )

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I had to open the slot out so the return spring would fit but apart from that the fitted easily

This is the list of things that need doing

Get a replacement front brake fluid reservoir
Front / rear brake pads
Braided lines
Re-paint the sprocket carrier
Chain and sprockets
Fix the engine

All going well when I've fixed the engine I should have a sparkly bike to tear around on
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On 02/11/2016 at 7:01 AM, paul8899 said:

 

On a side note I asked the purchasing department at work to see if they could get the crank bearings but the supplier we use can't get them, seems like the bearings aren't as easy to get after all !

or the alarm went off and someone had a Hitler rant when that part number was mentioned down at Koyo HQ

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16 hours ago, 2T Institue said:

or the alarm went off and someone had a Hitler rant when that part number was mentioned down at Koyo HQ

I think it's more to do with it's not an off the shelf bearing and they couldn't be bothered to special order just one bearing.

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  • 3 weeks later...

I thought I'd better make a start on taking the engine apart and came across the first of many problems.

I started to take the clutch apart and got this far before realising that I needed something to stop the middle bit from spinning

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So after a quick measure up, a while on the cad and a few hours on the mill I ended up with this

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And it fits :)

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Just have to work out how to take the rest of it apart now

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