Bought a 2 smoke!

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Brummmie

Original Poster:

5,284 posts

220 months

Friday 30th September 2016
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Looking at old pics, and got an itch when looking at photos of my nsr250,
Bought this as a non runner, cleaned the plugs and went third kick!


Spent today degreasing and cleaning, it's coming up nice, needs front mudguard painting, and new graphics on one side panel.
Going to put some proper race pipes on very soon.

Walter Sobchak

5,723 posts

223 months

Friday 30th September 2016
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Lovely bike, enjoy it!!.

Private Pile

754 posts

194 months

Friday 30th September 2016
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Love it. Tell us a bit more about it

Moulder

1,463 posts

211 months

Friday 30th September 2016
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Looks great! Does it have an oil leak already?

Turn7

23,504 posts

220 months

Friday 30th September 2016
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Great bikes - BUT - the powervalves had a habit of sticking and then hitting the piston.

IIIRC,the bottom cylinder was more troublesome.

Would be worth having the valves out and checking for general wear, in particular on the central pin that holds the blades together.

I really miss strokers......

Brummmie

Original Poster:

5,284 posts

220 months

Friday 30th September 2016
quotequote all
The bloke who I bought it off had a stroke, and was giving up, he must have been mid 70's!!
Turns out he used to race a bit bitd, like me self! hehe
I think a PV inspection and a re ring will be on the cards , maybe thicker base gasket and head gasket delete.
Raises the ports and lowers head to compensate.
I'll do a few miles on it next week perhaps, make sure I like the concept (again) , after my gsxr1000k6 it's gonna be odd...
But the 15mile cross country commute might? Be more fun?

rigga

8,727 posts

200 months

Friday 30th September 2016
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Ring a ding ding chancy, you'll love it, like back in the day great fun (when they run right)

Farlig

632 posts

151 months

Friday 30th September 2016
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Had an identical one back in the day... A wee interlude between a couple of gixxers - brilliant machine and managed to break my knee down virginity on it tongue out
Ran out of oil one time - the oil light wasn´t working and I over estimated the amount left, oops.
Blew the motor but good excuse to get a Stan Stephens Stage III rebuild - after that it was even more brilliant!!!
Miss it, but miss my old 500LC more, god I´m getting old... frown

podman

8,850 posts

239 months

Friday 30th September 2016
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Very nice mate, best of the RGV models and paintschemes IMHO too.

You are not far from The Tuning Works by the sound of it, Sean has lots of "essential" goodiea for those, have fun with it.

alvington89

209 posts

221 months

Saturday 1st October 2016
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Looks like a nice bike. Congrats on a top purchase!

Someone has painted the mirrors at some stage which is obviously not correct and I see they are starting to peel anyway, so I would take the rest off if it was mine.

I have two of the 'M' spec models in the blue and white scheme the same as yours so I'm a bit of a fan myself.

Tyga stainless steel pipes are probably one of the best you can get for this bike and weigh hardly anything (unlike the Isambard Kingdom Brunel originals). You can get the Tyga's from Sean at Tuning Works.

Get yourself over to the rgv250.co.uk site!

8potdave

2,280 posts

212 months

Saturday 1st October 2016
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Very jealous, love a stroker! First quick bike I rode was a TZR250 and I'll never forget it, first bike to crack a ton on.

That will be worth some money in a few years if you keep it clean, they are already ridiculously rare.

waynedear

2,158 posts

166 months

Saturday 1st October 2016
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Bought it's baby brother a couple of weeks ago, 125 fun

555 Paul

782 posts

148 months

Saturday 1st October 2016
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That looks fantastic, I love that colour scheme. I've never ridden a 2 stroke, they look like fun though and I'd imagine that they are quite light.

Turn7

23,504 posts

220 months

Saturday 1st October 2016
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555 Paul said:
That looks fantastic, I love that colour scheme. I've never ridden a 2 stroke, they look like fun though and I'd imagine that they are quite light.
No engine braking and lots of revs - absolute to hoot to ride.
One of my most enjoyable rides ever was a 45 minute scratch on a TZR250.

Biker's Nemesis

38,536 posts

207 months

Saturday 1st October 2016
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My mate Paul25 has one of those.

555 Paul

782 posts

148 months

Saturday 1st October 2016
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Turn7 said:
No engine braking and lots of revs - absolute to hoot to ride.
One of my most enjoyable rides ever was a 45 minute scratch on a TZR250.
Exactly as I'd expect it to be, I really fancy an old 2 stroke just for a bit of fun. I've got a few sports bikes but I want something a bit different. I can't use the power on my R1, something like that would be more fun for me I feel.

Steve Bass

10,186 posts

232 months

Sunday 2nd October 2016
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Brummmie said:
I think a PV inspection and a re ring will be on the cards , maybe thicker base gasket and head gasket delete.
Raises the ports and lowers head to compensate.
Not advisable.
Speak to Sean at TTW and do it right.
Get a selection of Base gaskets to achieve the correct squish.
IIRC you can't run these without a headgasket anyway. And all that does is move the port timing which ruins the power curve of a very good engine. Might seem more powerful with the harder hit but in truth does nothing.
If you want to improve the motor then do a full top and bottom end refresh including crank. Set the deck heights correctly and new single ring pistons. have the powervalves re pinned or get newer items.
If you are really feeling flush a set of Tyga pipes, domed and O ringed heads and a zeeltronic ignition and powervalve control unit will transform it.
Make sure that the powervalve cables are set correctly and you'll have a flyer. 65bhp is about the max but no messing around with porting or port timing or such. Reliable if jetted correctly and an absolute hoot.

Enjoy!

fridgedoctor

220 posts

158 months

Sunday 2nd October 2016
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Just gorgeous. I'll have that when you are done.

Brummmie

Original Poster:

5,284 posts

220 months

Sunday 2nd October 2016
quotequote all
Steve Bass said:
Not advisable.
Speak to Sean at TTW and do it right.
Get a selection of Base gaskets to achieve the correct squish.
IIRC you can't run these without a headgasket anyway. And all that does is move the port timing which ruins the power curve of a very good engine. Might seem more powerful with the harder hit but in truth does nothing.
If you want to improve the motor then do a full top and bottom end refresh including crank. Set the deck heights correctly and new single ring pistons. have the powervalves re pinned or get newer items.
If you are really feeling flush a set of Tyga pipes, domed and O ringed heads and a zeeltronic ignition and powervalve control unit will transform it.
Make sure that the powervalve cables are set correctly and you'll have a flyer. 65bhp is about the max but no messing around with porting or port timing or such. Reliable if jetted correctly and an absolute hoot.

Enjoy!
I mean by head gasket delete, an O ring conversion, Steve Clitheroe did my CR500 bitd for me with a re profiled squish.
Was worth about 2bhp.
There is a factory Suzuki kit base gasket, must be a reason they made it?
I am leaning towards Jolly Moto pipes, my first choice would have been Derek Huxley, he was the man but I think pipe manufacturing has took a back burner for him now.
His pipes are works of art.
Thanks for the info, I will give the Tuning works guy a shout thumbup

Steve Bass

10,186 posts

232 months

Sunday 2nd October 2016
quotequote all
Brummmie said:
I mean by head gasket delete, an O ring conversion, Steve Clitheroe did my CR500 bitd for me with a re profiled squish.
Was worth about 2bhp.
There is a factory Suzuki kit base gasket, must be a reason they made it?
I am leaning towards Jolly Moto pipes, my first choice would have been Derek Huxley, he was the man but I think pipe manufacturing has took a back burner for him now.
His pipes are works of art.
Thanks for the info, I will give the Tuning works guy a shout thumbup
Got you re the O ring head thumbup

Re the Suzuki kit stuff, a lot of time and technology has passed since those days. It's also very specific to proddy racer preparation so references premix jetting values, specific SAPC ignition boxes and such. Problem is the proddy bikes revved to 13k plus and had absolutely nothing below 10k. And a crank life of 500kms.
The other thing is you can't pick and choose what you want to do from the manual. All the things are interlinked so if you change the compression you need the specific SAPC. If you run that SAPC you must run Avgas... And so on.
These days the Tyga pipes are a very good road pipe with a better spread then the Jolly Moto or even the Local pipes some say,and the zeeltronic allows you to modify the ignition and powervalve curves by computer rather than requiring a different SAPC box. Perfect for really getting the bike spot on.
Also if you read the kit manual its settings require Avgas or Low Lead 100 octane. Good luck with that!
And DON'T run these motors on premix as it wrecks the left side mains journal. Just no need these days.
Speak with Sean, he really knows his stuff and put aside the assumption that the kit manual or preparation is the holy grail.
Do it right and you'll have a superb motor with lots of bottom end ( for a 2T) and a great spread of power from 8k.