For anyone with a passion of 2 stroke bikes

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EddieJ wrote

I've still got the copy of streetfighters with that tz in it, probably around 99/00.

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Mito350

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I hope that you have kept the mag in order to build your own special one day..

Yep, wont be a tz though

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EddieJ wrote

For the first time ever, I have to admit that rim tape looks good. Who did the fantastic paint job.

The rim tape is differrent colours on each side to match the paint job And it was painted by MRS in Ilkeston

There's a lot of work still to do on my latest one....Designed the frame myself, got someone clever to make it for me. Top frame tubes are the fuel tank, holds approx 1l of fuel. Rest of the frame is an air tank for the air-shifter. Motor is a YPVS bottom end with Cheetah barrels (US aftermarket) and 40mm Lectron carbs. The cylinders basically bring the YPVS up to modern specs - triple transfers, bridged inlet with subports and exhaust with subports. 80hp bolt on, should tune up to 100-120hp in drag trim.

Lathafummi wrote

Right here goes for my first post. Here is my rs250(sorry about the size if they are to big)

That is beautiful!

That is stunning Has it EVER been ridden? Looks brand new

Grib wrote

That is beautiful!

Cheers

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Not sure how you mean "how did I achieve" it? The angle is 38degs, which is based on the angle my old chassis was. That angle was already set when I bought the old chassis and then rebuilt it. I ran up to 130mph with no stability problems, so used the same angle for this one (even though it might top 150mph in the 1/4mile!). As far as achieving it for the purpose of building the chassis, the guy uses a frame jig that has an adjustable mandrel that holds the headstock. You then weld every to it! More info on the Cheetah barrels is here. Lots of barrel pics and some dyno charts. Not sure what size they dynoed there as you can get them in any size from 350cc upwards. The Cubs got to at least 440cc and the full blown Cheetahs (with CR250 reeds and slide PV's) go well over 550cc!Here's a better view of the mounts:Yup, lots of room to work on the engine and the mounts make pulling the motor out a breeze. Had too many bikes with welded on mounts that require 10 minutes of jiggling to get the engine in place. Eventually I'll probably put a pressurised airbox round the carbs too, another reason for all the space above motor!

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That is stunning Has it EVER been ridden? Looks brand new

TBF I think it has to be said it looks better than new. Im very jealous, Im yet to ride a Honda the last of the "Big Four".That RS looks mint too, What kind of BHP they kicking out?Brooky

OK, I'll play along. This first picture is my friend's bike. It is a 1988 or 89 Honda NSR 250 with a KTM 550 cc two stroke single cylinder engine transpant. It was his race bike for many years. We are currently in the middle of upgrading its appearance. He has purchased some modern looking body work from Tyga, which we will paint in orange KTM colors to look like the bike in the second picture. The last two pictures are of my own two stroke project. It too is a KTM 550. After riding his bike, I had to have one, and since I love supermotos, I had to have a 550 supermoto!

Ric wrote

Not sure how you mean "how did I achieve" it?

Sorry Ric, I did not phrase that very well I was just interested how the angle of 38degrees was arrived at. Whether it had been a trial and error measurement or some shrewd computer programme that gave the optimum rate angle for the length of fork (hope that makes sense) I know what you mean about the frame space. The early steel framed TZ's score very well when it comes to removing an engine. The pipes are held on by one bolt and two springs. Then just remove the plugs and carbs followed by two bolts on the rear suspension linkage and one bolt at the front, and the engine lifts straight out without hitting the frame rails. Ten minutes or so on my own and the engine is out.Sadly the ACU ruling for exhaust mounting has now changed and the exhausts now have to be secured in two places plus the springs, plus lockwire through the springs. Since when has an exhaust system ever fallen off a TZ. And even if it did, it would only rest on the belly pan!What paint finish if any are you putting on the frame? P.s I still think that you are mad!! Backdrifter, that is a very nice bit of kit..

Right, yes it was trial and error. Or rather trial and no error! If you check my site and look at the 14 Steps bit, you can see the old frame as it came with it already raked out. It worked, so I stuck with the numbers. I did do some calcs though to ensure I had enough trail for stability. I've seen some raked out like 45degs and they look wanky IMO, like they been dropped from a great height or snapped in the middle. Paint? No paint, it's all excess weight! The finish is as you see it, I'll just use ACF50 to keep rust at bay. I found paint looked tatty after a couple of meetings and was hard to keep looking good.Me mad? I'm not the one who races round corners in the wet! Straight and dry - nice and safe!

d

All those bikes look gorgeous!

d

Here we go again then, I've posted this before but here's my NSR250mc28se;And here's some less attractive photo's for all you 2 smoke droolers who think you want one.[ATTACH]67666[/ATTACH] [ATTACH]67667[/ATTACH] [ATTACH]67668[/ATTACH] [ATTACH]67669[/ATTACH]But this is the coolest key ever;[ATTACH]67670[/ATTACH]When it's right it's soo good you'd forgive it anything, which is fuckin lucky all things considered because it's wrong a hell of lot!And that Blue/White se is a beaut!

dan wrote

When I was looking to buy a bike last year went to a bloke's house who had an electric start RGV 250 - Japan only ?

Yes mate, VJ23, all new (in around '95) 70* v-twin c/w electric start, there's a few (like about 5) in the UK I believe, super rare and a bit of a bitch to de-restrict.But, look at this;And model specific 2 smoke forumsNSR's www.nsr-world.comRGV's www.rgv250.co.ukKR1's www.kr-1s.net/forumYam's www.yamaha-rd.comRacingwww.two-strokes.com/forums/index.phpGood sites full of nice stuffwww.dreamgate.ne.jp/nsr/index.htmltyga-performance.com/g025.spacelan.ne.jp/~moci/machine/www.europark.com/machines/ny-rmlst.htmJust some guy with a load of strokerswww.sportandtrack.com/Sports%20Bikes.htm

fontyy wrote

Yes mate, VJ23, all new (in around '95) 70* v-twin c/w electric start, there's a few (like about 5) in the UK I believe, super rare and a bit of a bitch to de-restrict.

There's definetly more than 5 now in the uk.Nice nsr

fontyy]But this is the coolest key ever wrote

67670[/ATTACH]

...........ain't it just!

priller wrote

There's definetly more than 5 now in the uk.Nice nsr

there are between 20 and 30,i,ve got 3 of them.there are 4 fully race kitted bikes in the uk and one of them is mine too.

d

For all you 2 stroke fans out there, Motorcycle Racer (May edition) has a 5 page article on Dani Pedrosa's Honda RD250R-W.

Build a proper 2-stroke animal Kawasaki H2-R!! Harris Performance sell the kit bar the motor. Kawaka Triples all the way, i own a S2350

d

Here is a pic of a 1971 Kawasaki S2 350 Triple like mine (my digi camera is fecked so ill post pics asap!)Here is a pic of what you should build!! the ulitmate killer 2 stroke:ThanksDTORU

fontyy wrote

Here we go again then, I've posted this before but here's my NSR250mc28se;

I want a bike that looks like that for the road!

im_slo_on_my_sm wrote

I want a bike that looks like that for the road!

That IS a road bike

Chunks wrote

That IS a road bike

Is it???!!?? I thought the indicators were so other racers knew you were turning off into the pits.

The best race bike to put on the road would be a Honda NSR500 the last one before the four stroke GP bike came out. That would be mental.

Ric wrote

Is it???!!?? I thought the indicators were so other racers knew you were turning off into the pits.

Oi!!1 less of the sarcasm grandpa I know you know it's a road bike but it seemed the other bloke didnt

d

d

Good book, already read it, can belive how much you paid though

d

Heres a few pics that you might find interesting, just stuff I found on't internerd and saved for a later look at It uses a shared crankcase and both pistons reach TDC at the same time otherwise crankcase compression would be buggered up.Boxer twin twostroke.

EddieJ wrote

I have managed to get hold of a copy of the 'bible'. It has only taken me three years to get a copy after getting outbid on ebay several times It cost me 110.00 usd but worth every penny with the copies on ebay going for between £80.00p - £200.00p. Amazon prices have been up around the £300.00p-£350.00p mark

How much??? I got my copy free from Colin when it was first published. BTW, couldn't really care less if powder coating weighed 1/3 of fack all, I'm still not painting or coating the frame. A light coat of ACF-50 will do the job required and keep it looking fine.

d

Any one have an opinion on John Robinsons "Motorcycle Tuning : Two Stroke" book?www.amazon.co.uk/exec/obidos/ASIN/075061806X/qid=1145047165/sr=8-1/ref=sr_8_xs_ap_i1_xgl/202-4365035-5106243

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EddieJ wrote

And my TA125! Not much between them..

Got a mate who says this engine is very like his old YES1 Never seen one so don't know my arse from my elbow with it.

brownie wrote

Any one have an opinion on John Robinsons "Motorcycle Tuning : Two Stroke" book?www.amazon.co.uk/exec/obidos/ASIN/075061806X/qid=1145047165/sr=8-1/ref=sr_8_xs_ap_i1_xgl/202-4365035-5106243

I have that book, it's quite good in a kind of overview sort of way.Well worth reading all the same though.

d

EddieJ wrote

Here you go They are based on the Yamaha AS3 road bike. Although factory supplied as a race bike, they share the same basis of frame and even still have the centre stand lugs etc on them. The race parts were also available for the road bike. They also ran pre-lube, but for some reason this one was either never fitted with it or it was removed. It should be a scary little thing to ride given where the seat position is and the fact the tyres are a triangle profile I also got a bit nervous about the authenticity of the bike when I first got it because of the lugs and the AS3 code on the frame. I have had the numbers all checked out and the bike is a genuine TA125, and is number 112 P.s. Do you any more info on the boxer engined bike, that is pretty amazing. I wonder how the came up with idea of using a boxer engine?

My mate (jonny bravo) on here said that you could buy a race kit for the one he has so it sounds about right.The Boxer twin bike was on MacDizzy's Two Stroke Technology Exchange and as I remember it used motocross cylinders (look like YZ yamaha cylinders) and both cylinders shared the same crankcase.They both reached TDC at the same time cos if they didn't then it would knacker primary compression up.I will see if I can find owt else out about it Unfortunatly Macdizzies is a pay to use forum but as far as I remember you can have a free trial period, theres some good information on there and the search engines pretty good for ratching it out.Regards Scott.

Heres another one you might like.V twin 500 (using YZ250 cylinders)

priller wrote

Gordon Jenning's 'two stroke tuner's handbook

You sir, are a star.Thank you very much Regards Scott.

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