ESE's works engine tuner

[TZ350]

http://www.elsberg-tuning.dk/supercharging.html

Near the bottom of the supercharging of small engines is a section on supercharging 2T' s ... two strokes.

[TZ350]

I was wondering how to mount the sprocket carrier onto these 3.5x17 front wheels that I am using for rears. Chambers suggested this neat idea of M8 cap screws in the old disk mounting holes for driving dogs and just slipping the carrier over them. The carrier will have its own support bearing and trapped in place by the axel spacers.

[Grumph]

I was wondering how to mount the sprocket carrier onto these 3.5x17 front wheels. Chambers suggested this neat idea of M8 cap screws in the old disk mounting holes for driving dogs and just slipping the carrier over them. The carrier will have its own support bearing and trapped in place by the axel spacers.

Make the holes in the carrier bigger - and do some rubber or urethane bushes to suit - and you've got a cush drive....

[Ocean1]

I was wondering how to mount the sprocket carrier onto these 3.5x17 front wheels. Chambers suggested this neat idea of M8 cap screws in the old disk mounting holes for driving dogs and just slipping the carrier over them. The carrier will have its own support bearing and trapped in place by the axel spacers.

Urethane bushes on the cap screw heads?

Might want to make them a bid deeper in that case, or they might try to climb out...

[Grumph]

Urethane bushes on the cap screw heads?

Might want to make them a bid deeper in that case, or they might try to climb out...

Could always use shoulder bolts - and cut the heads off once they're loctited in...

RS125 drive dogs aren't much more than 10mm socket head size.

[TZ350]

Good suggestions, thanks.



Using a Pit Bike front disk on the other side for a rear break.

[TZ350]

Been having untold trouble with Av's F4 bike drinking its gear box oil.



So after a few failed attempts at fixing it Chambers got serious and filled the gearbox with kero and leak tested it.



Av going around the outside at Mt Wellington.

And Av peddling her 600 in Italy.

[Sketchy_Racer]

I was wondering how to mount the sprocket carrier onto these 3.5x17 front wheels that I am using for rears. Chambers suggested this neat idea of M8 cap screws in the old disk mounting holes for driving dogs and just slipping the carrier over them. The carrier will have its own support bearing and trapped in place by the axel spacers.

Just for what its worth. I've run my cbr front wheel as a rear for years. I haven't bothered with a cush drive i don't think buckets really need them. I've just got a small aluminum adapter bolted onto where the disc was. Too easy.

[chrisc]

Been having untold trouble with Av's bike drinking its gear box oil.



So Chambers got serious and filled the gearbox with kero and leak tested it.

That looks promising

[chrisc]

Just for what its worth. I've run my cbr front wheel as a rear for years. I haven't bothered with a cush drive i don't think buckets really need them. I've just got a small aluminum adapter bolted onto where the disc was. Too easy.

Sketchy, what are you running the CBR wheel on?

[Ocean1]

Could always use shoulder bolts - and cut the heads off once they're loctited in...

RS125 drive dogs aren't much more than 10mm socket head size.

Rough cunt.

Just make some washers 3-4mm thick and the same dia as the bolt heads.

Put carrier on the bench, put some masking tape around the bolt heads, pour potable urethane into the holes in the carrier and sit the hub in position. A timing mark across the carrier/hub would help keep the bolt heads central in the holes. Viola!

Actually, before the urethane sets take it apart and start again.

Make those washers a tad smaller than the bolt heads. Reassemble. Tape inside the carrier holes. Pour more urethane and refit the hub. This way the bushes are stuck to the hub. Not sure why but its better that way in my head...

[wobbly]

What you need to remember is a proven fact at the end of the day is that an Aprilia B port total effective area is greater than the duct
smallest CSA that is feeding it.
What is important is the radial and axial geometry of that port entering the cylinder, and the effect this flow regime has on the scavenging efficiency.
Jan the maestro himself wondered on a forum somewhere ,about something I realised ages ago,the volume that is held sitting in the transfer ducts is that - that ends up in the cylinder.
The case simply refills that volume - there is no " flow " as such from the case into the cylinder even when the pipes big diffuser negative pressure ratio, is creating the max bulk flow around BDC.

[F5 Dave]

That was kinda my thinking in reverse about the aux exhaust ports but they are under considerable more pressure and less volume.

[Sketchy_Racer]

Sketchy, what are you running the CBR wheel on?

It was on my mb100 which is now the super charger bucket. Suzuki rgv250 vj21

[senso]

About the wheels, I have mounted Derbi GPR 50 rims in my brothers Gas Gas EC 125, the screws only undid themselves once, now, they are glued in place and its rock solid.