Street Stock 250cc 4-stroke twins

[chaos rider]

So explain the top speed theory please, I do not understand it
Cheers

im not explaining shit.. i said come watch and see for yourself

im done arguing with you people if you dont think i can do it come watch and see

4th oct race
15th nov trackday

im not going to taupo! i might go to hamton downs, ill see

[mossy1200]

You just told us you beat a cbr400.....and every other 250....whilst having posted pictures of tyres that haven't been hot, nor suffered from any lean angle, stress or power....

Cut him some slack and help him get better.people at track days dont all go hard so comparing bike on bike is wasted effort.I go to track days sometimes and the flashest go fast new bikes in fast class are some of the slowest on the track at times.Some people are happy not pushing comfort levels.Comparing apples with pears is pointless.
In all honesty I would expect the sung may not be grunty as some but will have great torque compaired to most.Every bike has strengths.It should handle fairly well and it has good wheel sizes for a 250 compaired to some with 18inch rims and others with biscuit wheels (ex250 ninja).

He might win then we gotta go out back and beat each other with big sticks praising Chaos future WSB champ.Its more likely than me winning lotto but I still buy a ticket every week.

[chaos rider]

I take on every posty with the intent to win it just doesnt happen all the time.
You can have a awesome race then one that stinks.Just go hard and at some point you will be happy with your results.May take couple races ,may take couple years.You will find that out at some point.If your one of a few twins, then although wins may not be as satisfactory as a larger race class at least you will be hardened vet by the time new guys start in the near future.The days of the 150 2stroke are reducing with their age and 250twin will be the next thing.Will mean you should get good resale value when you upgrade also.

Give us the rim size on that rear wheel 17/4inch etc cause that tyre is all wrong size wise to race on.The sidewalls are to high and the width is to wide.
Thats one reason the chicken strip is so large cause the tyre is not fully usable.Anybody thinks they could wear that strip off would need to be falling off to do it.

thats what ive been saying i leterly cant get rid of thoughs strips and i have tried i know the tire is totaly the wrong shape but im still saving to get new ones that are the right shape, size is right but like you said the side walls are to high

[mossy1200]

thats what ive been saying i leterly cant get rid of thoughs strips and i have tried i know the tire is totaly the wrong shape but im still saving to get new ones that are the right shape, size is right but like you said the side walls are to high

I would take the advice of a tyre fitment sheet before the recommended hyosung 150width cause I think that rim may need 140mm.Squeezing tyres changes the surface patch at lean angles giving you less contact patch than a slightly smaller tyre.Make you choice carefully.

[ducatilover]

Cut him some slack and help him get better.

We have been cutting plenty of slack, giving advice etc. Now lets just sit back until he realities how stupid he sounds.

im not explaining shit.. i said come watch and see for yourself

Sure, ever come down my way I will pay for a dyno run and beer.

[mossy1200]

You should try make the vmcc round 6 at manfeild.Streetstock class and 150 run together and there is good numbers.125gp runs same time but staggered start.Entry is 90 odd and transponder under 40.Plenty of free areas under cover in pits since you cant run tyre warmers thats no issue.Advertise on KB for shared cost travel and 250 should cover it.

[chaos rider]

I would take the advice of a tyre fitment sheet before the recommended hyosung 150width cause I think that rim may need 140mm.Squeezing tyres changes the surface patch at lean angles giving you less contact patch than a slightly smaller tyre.Make you choice carefully.

well the size i have on now (just went and checked tthe tyre) is 150/70/17, 69h? not sure what the 69h means but hoefully its helpfull

can you recomend what size tyre ect would work better?

[mossy1200]

Sure, ever come down my way I will pay for a dyno run and beer.

Dynos are my worst enemy.Mine just keeps pushing power around in circles.Try this try that.
Flatslides is the resulting answer to 70 dyno run questions.Wish I had worked that one out a grand ago.

[chaos rider]

You should try make the vmcc round 6 at manfeild.Streetstock class and 150 run together and there is good numbers.125gp runs same time but staggered start.Entry is 90 odd and transponder under 40.Plenty of free areas under cover in pits since you cant run tyre warmers thats no issue.Advertise on KB for shared cost travel and 250 should cover it.

my family is moving to aus in 3 months so i must save for that and get as much cheap track time in so if i have time and money i would go just as much as i would go to taupo
i make like 140 a week so my budget is real tight

[ducatilover]

Dynos are my worst enemy.Mine just keeps pushing power around in circles.Try this try that.
Flatslides is the resulting answer to 70 dyno run questions.Wish I had worked that one out a grand ago.

He may then learn how lean his bike will be

[mossy1200]

well the size i have on now (just went and checked tthe tyre) is 150/70/17, 69h? not sure what the 69h means but hoefully its helpfull

can you recomend what size tyre ect would work better?

If you take a tyre thats not on a rim and squeeze in the sidewalls you will see how the shape changes.Hyosung will slap a 150 look cool tyre on the bike for no other reason than it looks slightly fatter.What you might need could be 140/60 etc to get the best lean in speed and contact patch.
GPRA10s would be agreat tyre choice but they are dearish.Your bike should do 7 or 8 race days on a set as opposed to 2days on a big bike on slicks or one if your really fast rider on 1000cc at 6hundy to grand a set.

I would say your bikes most likely got 3inch front rim so 110 front
and 4inch rear rim so 140/70 or 150/70 and it needs to a v shape.
Best ask the bike shop what they recommend.150/70 is recommended for 4inch to 4.5 inch rim.
It may just be the shape of that brand lets them down.

[mossy1200]

my family is moving to aus in 3 months so i must save for that and get as much cheap track time in so if i have time and money i would go just as much as i would go to taupo
i make like 140 a week so my budget is real tight

you got 6weeks approx.every racer struggles with cash flow at some or many points.Get some pix of your bike with a short speel on the dairy windows etc advertising your keen to odd job it if you have too.Let people know they are helping you to self fund racing.Go see the car sales yards and offer to clean cars.
The guy who puts on shoes walks furthest.
When your eating instant noodles to buy tyres then you can claim poor.

[chaos rider]

If you take a tyre thats not on a rim and squeeze in the sidewalls you will see how the shape changes.Hyosung will slap a 150 look cool tyre on the bike for no other reason than it looks slightly fatter.What you might need could be 140/60 etc to get the best lean in speed and contact patch.
GPRA10s would be agreat tyre choice but they are dearish.Your bike should do 7 or 8 race days on a set as opposed to 2days on a big bike on slicks or one if your really fast rider on 1000cc at 6hundy to grand a set.

I would say your bikes most likely got 3inch front rim so 110 front
and 4inch rear rim so 140/70 or 150/70 and it needs to a v shape.
Best ask the bike shop what they recommend.150/70 is recommended for 4inch to 4.5 inch rim.
It may just be the shape of that brand lets them down.

i think it the brand cuz my dads 900 has the same rim and tyre size as me but his dont buldge like the shinkos so im thinking 150/70 diablos as mt eden have a special on at the moment 499 front and rear plus fitting

[ducatilover]

i think it the brand cuz my dads 900 has the same rim and tyre size as me but his dont buldge like the shinkos so im thinking 150/70 diablos as mt eden have a special on at the moment 499 front and rear plus fitting

What is the recommended size dude? Stick with the manufacturers size, they spent lots of time and money setting your bike up to be like it is. The sport demon are a decent tire but I found they lack a wee bit in lean angle.

[chaos rider]

What is the recommended size dude? Stick with the manufacturers size, they spent lots of time and money setting your bike up to be like it is. The sport demon are a decent tire but I found they lack a wee bit in lean angle.

well thats what i was planning not keen on spending 600 for a set of tyres that could screw up the ride compleatly

well it sould be better then what i have dont you think plus i dont tend to lean that much yet so moving up(or down lol) slowly would be good especialy for $499