66cc porting

[Neon]

What is it with kids trying to kill themselves these days? The best advice anyone can give is to wait a year buy a "real" motorcycle, go take your road test and prove you can actually handle yourself. That way you can cruise at 20 or 50 all day long if you wish. You won't make a lot of noise either.

 

[Amberly Spellend]

What is it with kids trying to kill themselves these days? The best advice anyone can give is to wait a year buy a "real" motorcycle, go take your road test and prove you can actually handle yourself. That way you can cruise at 20 or 50 all day long if you wish. You won't make a lot of noise either.

i have a 1997 cr500 with a overshaved head and a bored jet running running 95%methol and 4% nirto and 1% water with 40:1 castor in the mix pushing 140 hp and i race 125s

i do not think a bicycle can be something i would have a problems with how ever hydro v breaks are thouchy

could someone please help me with the porting

 

[Neon]

i have a 1997 cr500 with a overshaved head and a bored jet running running 95%methol and 4% nirto and 1% water with 40:1 castor in the mix pushing 140 hp and i race 125s

i do not think a bicycle can be something i would have a problems with how ever hydro v breaks are thouchy

could someone please help me with the porting

You are talking about completely different worlds here.
That is a motocross racing bike.
Playing in traffic is completely different. Smash into the back of a car, or have a car rear end you and you'll understand. A bicycle is completely different.
You should also pay more attention to your spelling. Don't know what "nirto" is. You probably mean methanol not "methol". Touchy not "thouchy". Never heard of hydro v brakes. Heard of hydraulic v brakes though. What's the 1% water for, to make the engine run rough. Good to see you found something that will stay mixed in with an alcohol based fuel.
I believe people have already tried to help you with porting. wouldn't hurt to read them again, Or go learn some basic engine tuning and actual terminology.

 

[Amberly Spellend]

You are talking about completely different worlds here.
That is a motocross racing bike.
Playing in traffic is completely different. Smash into the back of a car, or have a car rear end you and you'll understand. A bicycle is completely different.
You should also pay more attention to your spelling. Don't know what "nirto" is. You probably mean methanol not "methol". Touchy not "thouchy". Never heard of hydro v brakes. Heard of hydraulic v brakes though. What's the 1% water for, to make the engine run rough. Good to see you found something that will stay mixed in with an alcohol based fuel.
I believe people have already tried to help you with porting. wouldn't hurt to read them again, Or go learn some basic engine tuning and actual terminology.

water in alcohol based fuals stops it from pinging and alowing for better conpression and nitro content

i run 19.5:1 and at 5% nitro with 1% water

sorry about my spelling but i fractured my arm 3 days ago and im slighty high on meds

 

[Amberly Spellend]

All i want to know is.

1) What dose widing the ports do ?
2) I now want mostly mid range power so how much should i change the port timmin?
3) would you recommend any porting ?

 

[max350]

All i want to know is.

1) What dose widing the ports do ?
2) I now want mostly mid range power so how much should i change the port timmin?
3) would you recommend any porting ?

Buy this book http://www.amazon.co.uk/Two-stroke-Performance-Tuning-Graham-Bell/dp/1859606199
You can read all you want to know about two stroke tuning

 

[Abeagle]

Here is a link to the book in pdf that max350 is mentioning, its a free download.

http://3cyl.com/mraxl/manuals/bell/performance-tuning-graham-bell.pdf

 

[lazylightning@mail.r]

i have a 1997 cr500 with a overshaved head and a bored jet running running 95%methol and 4% nirto and 1% water with 40:1 castor in the mix pushing 140 hp and i race 125s

i do not think a bicycle can be something i would have a problems with how ever hydro v breaks are thouchy

could someone please help me with the porting

Hi Amberly!

Look, that Jaguar fellow has a link at the bottom of all his posts. If you navigate to it, you will find a porting section. http://www.dragonfly75.com/motorbike/timing.html

Here is the whole list of mods he suggests: http://www.dragonfly75.com/motorbike/index.html

Is that nitromethane or nitroglycol you running in the motobike mix. I think a 95% alchohol mix would fry one of these little cChinese babies. I've thought about the nitromethane thingy though...and anti-ping or other octane boosting modifications to the fuel mix. Any ideas?

Paul

 

[lazylightning@mail.r]

Now I see. Methanol is usually mixed with nitromethane.

 

[mountainman_oef]

Holy crap... this is amazing....if anyone is serious about squeezing everything out of your ht engine this is way to do it....Thank you so much for sharing this..