TZR50's

[ybk]

I came across a little TZR50 survivor in Japan which should be arriving in the coming months. This one's got 3000km on and looks to be not smashed to bits by a thousand spotty teenagers as most of them are.

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They're fun to work on and a laugh around the neighborhood, flat out everywhere.

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It's a bit rusty so it will be light cleanup project to get it right.

This one's the older 3TU type,

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I have the two of the newer types as well, the 4EU:

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Only the engines and tailpieces really differ.

This is how it looks now after I completed it (also a survivor at on 2500km):

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It used to look like this:

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Just busy cleaning up the my first one which I will probably sell at some stage:

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I've stripped it to clean up up some rust, replace rubber bits, crank seals and piston. Getting the engine done so that the new one has some space

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Too many projects too little time haha

[ybk]

The latest one has arrived at the depot so hopefully on the boat soon. Got a box full of spares coming as well so that is a nice early Christmas 

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[JKV45]

Neat little TZR!

I see they also have a TZR80RR, but of course, neither came to the US.

I have a Derbi GPR75, and it's a fun little ride.

The conditions in Japan are really hard on cycles used regularly and kept outside.

Nice collection you have!

[SeaR1ck]

From my bit of searching i believe this version of tzr50. Was the same thing as the tzr75 sold in some of Europe that got them. Some had the 75 some got the 50's based off different laws.

I believe the engine was mostly the same? Just one has the bigger bore top end. 75cc? Or was it 72cc? I'm not sure what other differences.

I had a 01 aprilia rs50 I made into an 80 with some 77cc malossi kit.

My small bore i have now is this 1994 yamaha tzm 150 from Thailand. Guys from tyga hooked it up. Was some brand new leftover got back in 2018.

It like some yamaha models is a bit of a parts bin bike. It's based like chassis wise off the tzr80rr. But the frame is beefier like the earlier tzr125's. With a different engine cradle. Tzr125 style swingarm wheels.

Tzr125 engine kinda crossed with later style 4dl engine setup and later version dt125r. Some parts are unique to the 150. Like the top end. But it's the same as the Tzr125 4dl just bigger bore.

It's fun lil ride got it to go 95mph on stock gearing and I was 1000 rpm under 11,500 redline.

For a short while my friend also had this Nsr150sp. The tzm was always a lil bit faster. But the nsr has the look bling factor.

[ybk]

I have a Derbi GPR75, and it's a fun little ride.

The conditions in Japan are really hard on cycles used regularly and kept outside.

Nice collection you have!

@JKV45 

That Derbi must be a blast!

And yes, it's really sad that most of these bikes are stood outside. The TZR that's on its way is very rusty. Someone rode put 3000km on it then left it stood for 30 odd years...

Just look at this  :

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All of that can be fixed, just a bit of a shame.

I have a set of perfect rims and new stanchions and a box of full of non-rusty spares so it should clean up nicely..

[ybk]

From my bit of searching i believe this version of tzr50. Was the same thing as the tzr75 sold in some of Europe that got them. Some had the 75 some got the 50's based off different laws.

I believe the engine was mostly the same? Just one has the bigger bore top end. 75cc? Or was it 72cc? I'm not sure what other differences.

I had a 01 aprilia rs50 I made into an 80 with some 77cc malossi kit.

My small bore i have now is this 1994 yamaha tzm 150 from Thailand. Guys from tyga hooked it up. Was some brand new leftover got back in 2018.

It like some yamaha models is a bit of a parts bin bike. It's based like chassis wise off the tzr80rr. But the frame is beefier like the earlier tzr125's. With a different engine cradle. Tzr125 style swingarm wheels.

Tzr125 engine kinda crossed with later style 4dl engine setup and later version dt125r. Some parts are unique to the 150. Like the top end. But it's the same as the Tzr125 4dl just bigger bore.

It's fun lil ride got it to go 95mph on stock gearing and I was 1000 rpm under 11,500 redline.

For a short while my friend also had this Nsr150sp. The tzm was always a lil bit faster. But the nsr has the look bling factor.

Yeah, yamaha made quite a few with some sharing parts and others unique. The later 4EU japan model had a 80 version as well I think. But there's also a Euro only TZR50 which had the minarelli engine I think. I don't like that model though...

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The older 3TU is my favorite, it has essentially the same engine as the older RZ50 and DT50. I picked up what looks like an 'untampered' spare engine in Japan just in case, this it what they look like:

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The later 4EU model's engine is a little overengineered with a starter motor and a balance shaft 

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Starter motor and balance:

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Look at the crank 

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For a short while my friend also had this Nsr150sp. The tzm was always a lil bit faster. But the nsr has the look bling factor.

The 150's are a lot of fun as well, had a few rides on those back in the day, TZM150/NSR150 and the RGV150 

[SeaR1ck]

https://ecooparts.com/en/used-auto-part/complete-engine/yamaha/tzr-80-rr/42732293_complete-engine-4ba-yamaha-tzr-80-rr-80rr.html?srsltid=AfmBOopeeN4vA49T_8aj0wWPRfkN731bbvKvpo1rgE-L7iGsopuRE3ZG

Ahh okay it's the later 4eu that has the same engine as the tzr80rr 4ba. From Europe.

The 150's were the kings in se Asia
Back in 90s early 2000's.
Never got to try the rgv150 it like the others were based off it's 125 euro base.

Supposedly the kr150 with a ton of mods ripped. It sure had the most variants of the different 150's. Always fancied the 97 serpico se edition. With the Krr150 se a close second.

The very 90's graphics them bright orange wheels. The kinda funky fairing that looked part 80's part 90's.

The Honda ls125 looks cool i found some Honda 80cc Thai "sport bike". Forget what it was called.
Small bore 2 stroke paradise back then.

[JKV45]

That Derbi must be a blast!

And yes, it's really sad that most of these bikes are stood outside. The TZR that's on its way is very rusty. Someone rode put 3000km on it then left it stood for 30 odd years...

Just look at this  :

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All of that can be fixed, just a bit of a shame.

I have a set of perfect rims and new stanchions and a box of full of non-rusty spares so it should clean up nicely..

The Derbi is a fun little bike. Performance is decent with the Mikuni Flatslide and Arrow pipe.
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Conditions in Japan are rough, but I don't think Yamaha's paint is very good either.

I've gotten used to seeing a lot of corrosion everywhere on my TZR250R.(before, blasted, powder coated)
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[ybk]

@JKV45

The Derbi looks real nice! Does it have an alloy frame?

And yes, Yamaha's paint is paper thin I have a bunch of NOS bits to replace all the rusty parts with. The frame I dip in a big bucket of citric acid solution. It removes all the rust in the nooks and crannies and leaves the paint untouched.

The rest of the bits I'll get blasted and painted. (that 3XV subframe is notoriously always rusted!)

[JKV45]

@JKV45

The Derbi looks real nice! Does it have an alloy frame?

And yes, Yamaha's paint is paper thin I have a bunch of NOS bits to replace all the rusty parts with. The frame I dip in a big bucket of citric acid solution. It removes all the rust in the nooks and crannies and leaves the paint untouched.

The rest of the bits I'll get blasted and painted. (that 3XV subframe is notoriously always rusted!)

Thanks!

There were 200 75cc GPRs brought into the US around 2000, from what I've gathered.

The frame looks like it could be aluminum - but it's painted steel.