fit electric start to a kick start tzr 125? + other tzr mods

[jordey]

im looking to buy a tzr 125 as it seems like the best 125 for me (well, that or dt but alot of them are either too expensive or seem dodgy).
theres really not many of them abotu so im having difficulty finding one, i want a 4dl but cant find any for reasonable prices. ive seen a fairly good tzr 125 2rk for 500 so am tempted to buy it as ive been searching for ages and there really isnt very much choice. its kick start though, would it be possible/ difficult to change the kick start to an electric start?

also, what other swingarm could i put into the frame? the stock one of the 2rk isnt very nice (4dl has a much nicer one) i also have rs 125 spare wheels and tyres which i would like to fit so would be good if the swingarm could fit these wheels (was going to fit the rs swingarm but chain is on the other side).

[G]

It doesn't sound like the best bike for you at all?

It sounds like you want the bike for the looks and you don't like the looks.

Why do you want electric start?
It's very costly and a load of hassle in most cases to convert a bike - when you're talking an XR650 used in baja racing, it makes good sense.
For a TZR125, not at all.

[jordey]

[Kickstart]

Hi

Not really cheap and easy. You would probably need a load of parts from the Italian market models (assuming they are similar enough to fit onto the engine), and a load of wiring mods. Certainly possible but probably cheaper and easy to hang looking for the one you want.

With the RS wheels there are several problems. Chain is on the wrong side so the rear wheel would have to run backwards. Wheel spindles are certainly a different size, hence needing spacers. Probably be a pig to get the speedo drive to work. Front disk is very different size hence you would need to make a spacer to mount the caliper.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Pete.]

Why would you want to remove the coolest part on the bike?
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a.k.a 'Geri'

132.9mph off and walked away. Gear is good, gear is good, gear is very very good

[jordey]

[jordey]

[Kickstart]

Hi

Swapping in a swinging arm is likely to be not easy. Anything is possible but it will require a fair bit of fabrication, with some accurate machining required or spacers and / or the swinging arm.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[jordey]

[Kickstart]

Hi

For the swinging arm you need to consider the width of the mounting, position of the brake torque arm, where the shock mounts, the type of linkage, the diameter of the swinging arm spindle, length of the swinging arm, provision for brake lines, and a few other odds and sods. Also if the linkage changes then you will probably need to get a shock with a different spring / damping rate, and the shock will probably be compressed at a different rate for the same amount of wheel movement.

For the front wheel / forks, you need to consider the speedo drive (unlikely the Aprilia one will be geared to match the Yamaha speedo for example), length of the forks, length and diameter of the steering head stem, etc. Heavier / lighter bike will likely mean different springs. And you might well struggle to get a bearing to fit the head stock of the frame.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[P.]

You could just buy a Derbi GPR engine. Electric start, no kick start. Engines retro fit.

[jordey]

[Kickstart]

[jordey]

[jordey]

[Kickstart]

Hi

Afraid screwing up the handling just for looks wouldn't be my idea of fun .

The TZR frame is pretty narrow, hence likely quite limited on what will fit.

Yamaha sold their basic engine to other makers. Think Sachs might also have used it. However not 100% sure that the early TZR125 has the same engine mounts as the later engines.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[jordey]

[Kickstart]

Hi

Fair enough. Odd size tyres won't help, nor will suspension that doesn't match.

Realistically once you add the cost of odds and sods (brake hoses, spacer, bearings, etc) you probably could buy a 4DL easily.

All the best

Keith (and if you find an early blue fully faired 2RK, please don't hack it about!)
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[Ariel Badger]

Converting to electric start is easy if you know how, you would of course need a full engine strip down and some re-machining of the crank. the castings would need to be altered at best but I would think you would need to make new patterns, get them cast and machined and then there is the rewiring. £2000 or so?
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Bikers make great organ donors, get 115 on your licence today.

[jordey]

[G]

It still is likely to be easier, cheaper and quicker to wait a bit and buy the actual bike you want - you'll also get more time riding it (or more time being seen ridden it, if that's what's important to you ).

[Ariel Badger]

[P.]

[Timmeh]

I'm on my second 4DL2. It cost me 700 quid.

I wouldn't really call that expensive tbh, if you compare it to pre-99 RS125s and Mitos.

They have 26bhp as standard, will do about 90, the ride is harsh and unforgiving and the handlebars only turn about 70 degrees so don't handle at all well at slow speeds. U-turns are practically impossible.

That said, they are fun to ride, but you really do need to take the bull by the horns as they are can be quite twitchy. I'm quite light so I have to shift my weight and countersteer to get them to lean in. I wouldn't call them learner bikes by any stretch of the imagination.


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GSXR400 x2 | '94 RVF400 | '93 TZR125 4DL (again)
20:22:30 BLUEX5: i would love to be forced to undergo a**l plugging with different sizes
20:48:18 Temeluchus: comp you hunk of smouldering homos3x you

[jordey]