[ball]

I picked up a 2007 yamaha scooter with bits missing from the engine for the grand old sum of $0

The main piece missing was a cylinder. I have been waiting until the big bore ones to suit this engine came into stock. I noticed they were available Friday so I thought I would drag it out and start stripping it for the full ball treatment.

What was once a measly 49cc is going to be punched out to a big block monster of 83cc during stage 1 of the build.

If that isn't fast enough then I will buy the stroker crank that takes it out to a bit over 100cc.

In kit form



Engine Cases stripped for cleaning

[tombutt]

that looks life fun i have a z50 one day that i want to piece back together and put a big bore kit on it

[steak_knife]

You have all the fun!!!

[ball]

tombutt wrote:

that looks life fun i have a z50 one day that i want to piece back together and put a big bore kit on it

you can get them out to about 135cc

[steak_knife]

ball wrote:

tombutt wrote:

that looks life fun i have a z50 one day that i want to piece back together and put a big bore kit on it

you can get them out to about 135cc

So it would out run a sierra??

[tombutt]

ahaha yeah ive seen those kits are some even crazier ones in europe but u dont really keep any of the standard engine and they cost a fricken mint

[ball]

steak_knife wrote:

ball wrote:

tombutt wrote:

that looks life fun i have a z50 one day that i want to piece back together and put a big bore kit on it

you can get them out to about 135cc

So it would out run a sierra??

That's my plan

[ZookiMonsta]

where's davo_92? Should put a fully sik wing on it and T684 turbo and a phatazz blow of valve.
Will b fuli sikc cuz.

[Ridge]

have you thought about putting in a mini bike motor?
you can pick up a 140cc motor and gearbox from ebay for cheap.
I have put a lifan 140 in my mini when the original gearbox died. it was cheaper to buy a whole new motor/box then to replace the original.
it has about 13hp and will do about 80km/hr.

[ball]

Ridge wrote:

have you thought about putting in a mini bike motor?
you can pick up a 140cc motor and gearbox from ebay for cheap.
I have put a lifan 140 in my mini when the original gearbox died. it was cheaper to buy a whole new motor/box then to replace the original.
it has about 13hp and will do about 80km/hr.

They are 4 stroke, so they are banned from my toy collection.

These are about 4.5 hp stock, I am aiming for 15+hp. If it doesn't go fast enough, I keep tweaking until it does.

[tombutt]

my z50 is 4 stroke ive thought about putting a pit bike engine in it as ive already got few lieing around just a temp measure

[jonno_racing]

u can also get twin cam 4 or 5 vavle pit bike motors.. up to 160cc

[ball]

jonno_racing wrote:

u can also get twin cam 4 or 5 vavle pit bike motors.. up to 160cc

And they all sound like a constipated briggs and scrap iron.

There is no better sound than a 2 stroke screaming it's guts out

[shep]

4 strokes belong on pumps and cement mixers hay ball

[ball]

shep wrote:

4 strokes belong on pumps and cement mixers hay ball

yep

[jonno_racing]

dunno mine sounds pretty good on the limmiter! love it rebuids are cheep! so are rear tires..

[steak_knife]

jonno_racing wrote:

dunno mine sounds pretty good on the limmiter! love it rebuids are cheep! so are rear tires..

I see a common theme with you Jonno..

[tombutt]

haha rebuilds are cheap yes but they brek easy also

[TZAR]

ball wrote:

Ridge wrote:

have you thought about putting in a mini bike motor?
you can pick up a 140cc motor and gearbox from ebay for cheap.
I have put a lifan 140 in my mini when the original gearbox died. it was cheaper to buy a whole new motor/box then to replace the original.
it has about 13hp and will do about 80km/hr.

They are 4 stroke, so they are banned from my toy collection.

These are about 4.5 hp stock, I am aiming for 15+hp. If it doesn't go fast enough, I keep tweaking until it does.

don't get me wrong as I have never worked on one of these but dont the have a variable speed belt drive so that to get it to go faster you have to make it rev harder and power has no real relation to top speed.

I understand power is king and it helps to get to top speed quicker.

Please correct me if I am wrong

[ball]

TZAR wrote:

ball wrote:

Ridge wrote:

have you thought about putting in a mini bike motor?
you can pick up a 140cc motor and gearbox from ebay for cheap.
I have put a lifan 140 in my mini when the original gearbox died. it was cheaper to buy a whole new motor/box then to replace the original.
it has about 13hp and will do about 80km/hr.

They are 4 stroke, so they are banned from my toy collection.

These are about 4.5 hp stock, I am aiming for 15+hp. If it doesn't go fast enough, I keep tweaking until it does.

don't get me wrong as I have never worked on one of these but dont the have a variable speed belt drive so that to get it to go faster you have to make it rev harder and power has no real relation to top speed.

I understand power is king and it helps to get to top speed quicker.

Please correct me if I am wrong

I am not after top speed, just acceleration.

The hot up parts available for these things is unbelievable. Different weights and springs for the variable speed drive, different final drive ratios, big carby's and reed cages etc. I also have a lathe so I can just make a bigger pulley to get more speed.

Getting revs isn't hard, it is going to be a very short stroke motor, there is plenty of meat in the cylinder to make the ports better. The pipe is the key, I can buy an off the shelf one but I don't know how that will go with the port timing I am aiming for.

As it has a variable speed drive I can make the engine quite peaky and try and keep the revs where the most torque is made.

[royce]

can you ride it to Brisbane so I can have a go?

[foolsp33d]

jonno_racing wrote:

u can also get twin cam 4 or 5 vavle pit bike motors.. up to 160cc

keep going.. 175cc is where its at atm...

Lol @ ball.. we MUST have action pics once its rebuilt!!

[ball]

royce wrote:

can you ride it to Brisbane so I can have a go?

I might post it down next year before the rally and take it back with me when we go.

We are thinking about a piss up when we get there so it would be the perfect opportunity to see drunks get hurt.

[shep]

ball wrote:

royce wrote:

can you ride it to Brisbane so I can have a go?

I might post it down next year before the rally and take it back with me when we go.

We are thinking about a piss up when we get there so it would be the perfect opportunity to see drunks get hurt.

haha i will take my leathers.

[ball]

shep wrote:

haha i will take my leathers.

don't be a girls blouse, you can strip bark off like the rest of us

[shep]

ball wrote:

shep wrote:

haha i will take my leathers.

don't be a girls blouse, you can strip bark off like the rest of us

nope, braking bones hurts less, and ya get to perv at nurses.

[ball]

Had a re think on making this thing rev a bit too hard

http://www.streetbuzz.net/videos/video- ... -crash/en/

[shep]

don't be a nancy. just put a bit of a shroud over it to catch the bits.

[jonno_racing]

so a pitbike motor and box is looking good?? i have it on good authority they will hold 4th gear skids on the limmiter... and only stuff a set of rings!

[ball]

jonno_racing wrote:

so a pitbike motor and box is looking good?? i have it on good authority they will hold 4th gear skids on the limmiter... and only stuff a set of rings!

Why would I fuck around with a poxy pit bike motor?

They are 4 strokes with fuck all power.

I will send the whole lot back over to the scrap yard before I would use a 4 joke.