I just scored a Z200

**Ixion** · 26th June 2006, 01:55

Originally Posted by T.W.R

,,This doco (Daily Mail 1980 motorcycle review) says the tyres are 2.75x18 front & 3.25x17 rear so I suppose thats 90/90x18 front & 110/90x17 rear ?

No, they are tubed tyres. Tubed tyres (cross ply) are sized in inches , as here. The 90/90 etc sizings are tubeless.

Tubed crossply tyres are (almost) never low profile, - so it would be 2.75/2.75, but never quoted thus.

2.75x18 and 3.25x17 tyres are still available - eg Bridgestone G511 (front) and RS10 (rear).

Crossply tyres generally run lower pressured than radials becuase the walls are stronger. Original spec pressures for the Z200 were 1.75 bar (about 26psi) front , 2 bar (8psi) rear. Depends a lot on your weight too on such a light bike.

**lb99** · 26th June 2006, 07:23

so could I use tubless tyres with a tube in, or should I try to find some tubed ones? The front brakes are shit, the cable disk is crap. would the vin guys notice (or care) if I did a hydraulic conversion?, other than that I was very impressed, it goes hard for a single, I was going to ride it to work today, but I can't afford to get busted, way too much$$$

**T.W.R** · 26th June 2006, 11:06

Originally Posted by Ixion

No, they are tubed tyres. Tubed tyres (cross ply) are sized in inches , as here. The 90/90 etc sizings are tubeless.

Tubed crossply tyres are (almost) never low profile, - so it would be 2.75/2.75, but never quoted thus.

.

Wrong Ixion

sorry

The difference between the two is conventional or Metric description not whether they are tube or tubeless. The descriptions of tyre section width, speed rating, aspect ratio, rim diameter, speed rating, & load index contribute nothing to whether the tyre is tubed or not.

The metric description of aspect ratio is mainly found on radials and the term 'low profile tyre' is just that a 'term', as the measurement is only a % of the tyre width

The tyre construction whether it be crossply, bias or radial doesn't contribute either. The only factor that goes against using tubes in radial tyres is heat build-up, particularly in larger/heavier roadbikes.

Of course the tyres on the Z200 will be tubed, and thats only fact the rims aren't tubeless tyre applicable.

**Bonez** · 26th June 2006, 16:42

Originally Posted by lb99

so could I use tubless tyres with a tube

YES you can. I do it all the time on the old style spoked rims on the CB550 and Gb400. Theorically it "shouldn't" be done because of the ribbing and less than smooth inside of tubeless tyres is ment to chaff the tubes, but experiance has shown absolutely no problems what so ever in normally day to day usage as, well as some serious touring kms and the odd thrash. The tyres wear out well before damage is done to the tubes, which normally get fitted to 2 or 3 tyres before I replace them. Not because I "need" to I just feel more comfortable doing so.

With the Z200 being so easy on tires I'd suggest changing the tube with every tyre change though.

**lb99** · 2nd July 2006, 15:25

Well after a whole lot of scrubbing and polishing, Here it is, all ready to go.
It took about 50hrs, I have a very accomodating boss, so I managed to do a lot at work, but I spent many hours in the shed too!, I haven't been to bed before midnight all week

the missus calls the bike "your whore"

Anyway, new tyres, battery, brakes, and oil and filter and now I have no money for petrol, so I have to syphon Her cage

I like it a lot, it goes, handles and stops really well for such a little bike, I got it up to 135, which is faster than any XR200, and it should return 70+MPG too!

**Kickaha** · 2nd July 2006, 15:41

Originally Posted by Bonez

Theorically it "shouldn't" be done because of the ribbing and less than smooth inside of tubeless tyres is ment to chaff the tubes

Thats why you should always use tyre talc when fitting them with tubes

**lb99** · 11th July 2006, 13:38

Well, It passed the VIN inspection this morning, so its all legal now.
The inspector raved on about what a great little bike it was,

: I nearly had to push him off to get it back.
so, now that I'm legal, I'm gonna sell the cage and save up for a fire breathing monster like you guys ride

**Bonez** · 12th July 2006, 19:49

Originally Posted by lb99

Well, It passed the VIN inspection this morning, so its all legal now.
The inspector raved on about what a great little bike it was,

: I nearly had to push him off to get it back.
so, now that I'm legal, I'm gonna sell the cage and save up for a fire breathing monster like you guys ride

Well done!

Wouldn't call a CX500 or GB400 fire breathing monsters though

**lb99** · 12th July 2006, 20:19

Originally Posted by Bonez

Well done!

Wouldn't call a CX500 or GB400 fire breathing monsters though

I had a lot of fun on a GB400, they go like a grunty trailbike, and are light so they handle pretty well, not much good for going over traffic islands and up and down stairs tho

**Bonez** · 12th July 2006, 20:36

Originally Posted by lb99

I had a lot of fun on a GB400, they go like a grunty trailbike, and are light so they handle pretty well, not much good for going over traffic islands and up and down stairs tho

Great for leaping of Bailey Bridges though

Well was, the saddle road is never going to be the same.................