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MC21 Rebuild in memory of my brother


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fasteddy

 
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MC21 Rebuild in memory of my brother

Mon May 23, 2016 2:01 am » Post: #1 » Download Post

The background to this build can be found here, http://nsr250.net/forums/viewtopic.php?t=13893&highlight=
And so it begins
Finally, the opportunity to head down to Sydney to pick up my brothers NSR250 presented itself in the form of a four day weekend. The drive down was a bit of a disaster due to traffic in Brisbane (crash on motorway) delaying my journey by over an hour. In retrospect that was the easy part as when I finally arrived in Sydney I was met with peak hour traffic (worse than the traffic caused by the crash in Brisbane!), total drive time fourteen and a half hours!
The next morning I was up at sparrows fart to start getting my ute ready for the bike. Prior to my arrival my father had made me a set of wheel stands for my ute, not a bad job I might add. These were bolted in without a hiccup along with a pair of eyebolts for the rear wheel tie down strap.

After all was done the bike was loaded on for a test fit as there were concerns of the bike not fitting between the toolboxes, those fears were quickly dispelled. Everything worked and fitted as it should.

Once I was satisfied everything was good for the drive home I took some time to inspect the bike a little closer. Well it definitely wasn’t the pristine NSR I once remembered, years of sitting under covers in a carport had taken their toll on the old girl. My arch nemesis rust had decided to jump on board in any place he could, the original road fairings which I remembered as being pristine looked to have been through an accident (mmm, appears my brother neglected to tell me about this!), the front brake master cylinder was seized along with carbies and the rear rim now sports a dent.





Although it didn’t look great most of the issues were easy fix problems that would be sorted out as the bike was rebuilt.
After two days in Sydney visiting some friends and spending some time with mum and dad it was time to bring the old girl home to begin her restoration. Having the NSR on the ute must have brought some luck as the drive home only took twelve hours!
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fasteddy

 
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Mon May 23, 2016 5:38 am » Post: #2 » Download Post

Home at last and it didn’t take long to strip the fairings, tank and ducktail. I then began on removing the exhausts and carbies along with any other accessories to facilitate the removal of the engine. Surprisingly this all went very smoothly and it wasn’t long before the engine was sitting on my work bench.

For now, I left the bike and concentrated on stripping down the engine to assess the condition of the cylinders, crank, clutch and gearbox. I am currently in discussions with Andy about having the crank rebuilt along with their signature SP tune on the engine. To make the most of this, I’m looking at finishing the engine with a list of tyga parts my brother had noted in his wish list.
Always open to hearing people’s thoughts and ideas, they are always greatly appreciated.
So first thing last, remove cylinder heads and barrels. Everything came apart well considering how rusty some of the studs were.
Rear cylinder, the barrel appears to be in good condition with hone marks still looking clean, the piston does have some score marks which thank god weren’t replicated on the cylinder, the pistons and rings will all be replaced. The cylinder head I think may be a write off due to extensive corrosion (when the bike was stored it didn’t have its cooling system drained). Is this head salvageable?





The front cylinder is much the same as the rear cylinder and appeared to be in good condition again with clean hone marks although not as good as the rear cylinder. The head was also a write off which doesn’t bother me as I already have another rear head to go on the front cylinder.





Once I had removed the cylinders and pistons I moved on to remove the clutch and gearbox. Being that the engine has less than 13000km I was expecting everything to be in pretty good condition but when I pulled the clutch plates out I was a little surprised to see both the basket and hub looked pretty flogged out. Is this normal wear for a dry clutch with less than 13000km?
And next but more importantly where am I able to source the hub and basket?


With the clutch removed, I then pulled out the gearbox. Finally nice to open a part of the engine and find everything in pristine condition, even the gearbox bearings feel like new ones. Would it be ok to re use the gearbox bearings? The oil that was drained was close to pristine, I know my brother replaced gearbox oil every 4000km or after every race day.
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messer

 
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Mon May 23, 2016 7:02 am » Post: #3 » Download Post

Great start to the project look forward to following this thread. I've just landed a 21 to go with my 28 so looking forward to seeing the detail you go to.

Love these nsrs they are such a great bike. Enjoy the build.
Tony
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Andy
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Mon May 23, 2016 12:05 pm » Post: #4 » Download Post

It's been well used! But it's a long way from the worst I've ever seen! Smile

Looking forwards to seeing how it progresses. Did you get my e-mail?
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fasteddy

 
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Mon May 23, 2016 9:59 pm » Post: #5 » Download Post

Hi Andy,
Yes i did get your email, you should have a reply by the time you read this.
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The17thPope

 
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Fri May 27, 2016 4:05 am » Post: #6 » Download Post

Nice One fasteddy.

I too am building my MC21 up, so an keen to follow your updates and to see what challenges (if any) you come up against and how you get around them.

I'm in Melbourne, so good to see another convict country NSR refurb under-way.

Good luck mate end enjoy the journey.

All the best.
Popes

P.s. - I've started a FB Page for mine if you're at all interested and also may have some parts as well.
Email me at Popespartsimports@gmail.com if you need anything and I'll see if I have anything to assist as I'm trying to kick off a NSR Parts business.

https://www.facebook.com/93NSR250RSPRebuild/
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Lesviffer750
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Fri May 27, 2016 7:56 am » Post: #7 » Download Post

Hi Eddy, looks a nice basis to start with, that gas tank looks like it could be a problem though, good luck with it, and keep the piccies coming.
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fasteddy

 
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Fri May 27, 2016 11:53 am » Post: #8 » Download Post

Thanks pope, I've seen a few of your threads and see your doing up a 93' sp. Seeing as though you mention hard to get parts, the one the thing I'm really chasing is a clutch hub and basket (dry clutch), you dont happen to have a spare do you?

Hi Lesviffer750, yeah the tank is retired well and truely. My brother had purchased another tank which is still in pristine condition thank god. More pics to come shortly
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The17thPope

 
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Mon May 30, 2016 3:07 am » Post: #9 » Download Post

fasteddy wrote:Thanks pope, I've seen a few of your threads and see your doing up a 93' sp. Seeing as though you mention hard to get parts, the one the thing I'm really chasing is a clutch hub and basket (dry clutch), you dont happen to have a spare do you?


Hey Eddy,

I only have a HRC Clutch Kit and am thinking about putting this into mine. If I do, I'll have mine for sale and it's in really good knick.
So although I don't have an answer right now, I will have soon enough. I can keep you updated if you like?

And if I hear of any, I'll ping you a PM.

Cheers
Popes
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fasteddy

 
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Tue May 31, 2016 2:03 pm » Post: #10 » Download Post

Thanks popes.
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