ESE's works engine tuner

[TZ350]

Now for something we have done before, weighing wheels.

As reality is impossible for anyone one to measure, we can only hope to make better measurements that give a clearer picture of what we are looking at.

So in the interests of improved accuracy we thought of calibrating the scales first and then working at or near the calibrated value.

Given that 1L of water weighs 1kg. then 4 x 2 L milk bottles filled with water will be 8kg and 5 will be 10kg.

So we adjusted the scales to read 8kg with 4 milk bottles and 10kg with 5. Then weighed the wheels and tyres with added milk bottles so the scales were working in the calibrated region.

The results after deducting the known weight of the milk bottles were :-

Suzuki (GSXR front wheel) 3.5x17 rear with tyre 8kg
Rear rim only 4.2kg and tyre only 3.8kg

Honda NSR MC16 2.5x17 front with tyre 5.5kg
Front rim only 3.25 and tyre only 2.25kg

Maybe not exactly accurate but probably a better result than last time.

[Farmaken]

Had a bit of a play with a SV front rim to make up a lighter rear for my bucket.
Ended up at 9.6 kg versus 11.2 for the gs rim.

Not a total solution but a cheap step in the right direction

[Bert]

Had a bit of a play with a SV front rim to make up a lighter rear for my bucket.
Ended up at 9.6 kg versus 11.2 for the gs rim.

Not a total solution but a cheap step in the right direction

nice work Farmaken..
I suspect this might become quite common.

you might find that you need some internal meat/support on the mounting plates for the sprocket and disk to transfer load too (off the bolts); I ran into bolts snapping.
But you may have already done this (not clear in the photos).

[bucketracer]

Not a total solution but a cheap step in the right direction

That looks like the rims that TeeZee has, Suzuki must use the same rim on several different bikes.

Cheap practical solution in the right direction, that appeals to TeeZee.

Good work Ken. That looks like a pit bike disk, did you have to space it out? What is the sprocket carrier off?

[bucketracer]

RS complete Front wheel 8.0kg complete Rear wheel 9.5kg

compaired to:-

Wire complete Front wheel 9.0kg complete Rear wheel 9.5kg
FZR complete Front wheel 9.0kg complete Rear wheel 12.0kg

The results after deducting the known weight of the milk bottles were :-

Suzuki (GSXR front wheel) 3.5x17 rear with tyre 8kg
Rear rim only 4.2kg and tyre only 3.8kg

Honda NSR MC16 2.5x17 front with tyre 5.5kg
Front rim only 3.25 and tyre only 2.25kg

Maybe not exactly accurate but probably a better result than last time.

Had a bit of a play with a SV front rim to make up a lighter rear for my bucket.
Ended up at 9.6 kg versus 11.2 for the gs rim.

Looks like Farmakens Suzuki rear is much the same weight as a std RS rear.

[Farmaken]

Cheers Bert & bucketracer


It is a pit bike disc ( $15 on TM ) on home made carrier to adapt bolt patterns

Sprocket also on kenbuilt carrier

Disc and sprocket located on spigots with spiggoting bolts to take load -- time will tell if they are strong enough

[husaberg]

Cheers Bert & bucketracer


It is a pit bike disc ( $15 on TM ) on home made carrier to adapt bolt patterns

Sprocket carrier also on kenbuilt carrier

Disc and sprocket located on spigots with spiggoting bolts to take load -- time will tell if they are strong enough

Dowels...?

[2T Institute]

Now for something we have done before, weighing wheels.

As reality is impossible for anyone one to measure, we can only hope to make better measurements that give a clearer picture of what we are looking at.

So in the interests of improved accuracy we thought of calibrating the scales first and then working at or near the calibrated value.

Given that 1L of water weighs 1kg. then 4 x 2 L milk bottles filled with water will be 8kg and 5 will be 10kg.

So we adjusted the scales to read 8kg with 4 milk bottles and 10kg with 5. Then weighed the wheels and tyres with added milk bottles so the scales were working in the calibrated region.

The results after deducting the known weight of the milk bottles were :-

Suzuki (GSXR front wheel) 3.5x17 rear with tyre 8kg
Rear rim only 4.2kg and tyre only 3.8kg

Honda NSR MC16 2.5x17 front with tyre 5.5kg
Front rim only 3.25 and tyre only 2.25kg

Maybe not exactly accurate but probably a better result than last time.

Examined te benefits of using Helium gas instead of air, it's lighter

[Yow Ling]

a worn out tyre would be a weight saving as well, I have some in stock

[speedpro]

The bolts to use are called shoulder bolts.

[teriks]

The drillings would possibly create alot more turbulence in the advancing flame front, thus improving combustion speed.
But I believe that a sharp corner at the squish edge does the same thing, and the toroid/bathtub shape pulls the plug down
into the area that has the greatest turbulence - I will stick with that approach.

Very good idea methink.

[TZ350]

Disc and sprocket located on spigots with spiggoting bolts to take load -- time will tell if they are strong enough

The bolts to use are called shoulder bolts.

Early 70's TZ250/350's used shoulder bolts on the rear sprocket and no cush drive.



The TZ shoulder bolts shoulder went right through the sprocket and the shoulder located like a dowel into the hub, the thread was only for holding it in place.

[husaberg]

Early 70's TZ250/350's used shoulder bolts on the rear sprocket and no cush drive.



The TZ shoulder bolts shoulder went right through the sprocket and the shoulder located like a dowel into the hub, the thread was only for holding it in place.

Ok but i could be wrong here but the TZ at least the later ones from memory have a cush drive in the Hub don't they?
also remember the shock absorbing qualities of traditional spoked wheels

Nah don't worry i am being overely pedantic.it most likely will be sweet.
I still do, think dowels are a more acceptable solution for resisting the shear forces that will be acting on the sprocket.
Bolts are primary for clamping.That's not to say that if HT bolts and if the correct area of shank and at the correct torque won't work(cause it will) as they will also provide lots of friction assuming the areas make good contact and are tight fitting. Or that spigot or shoulder bolts are bad.

My problem is on the NC23 front wheel i am using on the rear is Honda used tiny bolts compared to the MC19.

[Yow Ling]

My problem is on the NC23 front wheel i am using on the rear is Honda used tiny bolts compared to the MC19.

Cant you just drill and retap it ?

[wobbly]

And I know from experience that TZ sprockets must use lockwire or the old bent tab retainers, as with no cush in the clutch - or the rear hub ( unlike all the road bikes)
these bolts loosen monotonously.