Exactly Bass Ackwards.

<HTML>

The information provided above with respect to the sprockets is 100% incorrect. A smaller front sprocket will result in better accelleration and lower top speed. A larger front sprocket (more teeth) will give less accelleration and higer top speed. A good way to express these numbers are in terms of a front/rear ratio. A hypothetical example would be if both front and rear had the same number of teeth. This would be a 1:1 ratio. Another hypothetical situation would be the front has half as many teeth as the back. This would be a 0.5:1, or 1:2 ratio. This would give rapid accelleration, but would be limited on top speed due to the ratio. Third possibility would be twice as many on front as back. This would be 2:1 ratio. In this configuration, the rear wheel will turn twice for every engine rotation.

DISCLAIMER- these numbers are hypothetical only, and do not represent actual ratios for use on mopeds, but they are used to show effects of sprocket sizes.

SteveM.</HTML>

That's exactly Bass Ackwards.

<HTML>If you decrease the size (number of teeth) on the front sprocket, the moped will accellerate faster and have lower top speed. If you increase the size, the moped will accellerate more slowly, but have higher top speed.

SteveM.

leo wrote:

-------------------------------

sir

here is the deal with the sprockets. if

you increase the number of teeth on the

countershaft sprocket(from the engine) it will make the moped accelerate quicker but

top speed will be slower. if you decrease

the countershaft sprocket teeth number you

will make the moped slower off the line but

overall top speed will be faster. the best

way is to increase the countershaft teeth

and reduce the rear wheel sprocket teeth.

its less expensive just to mess with the

countershaft sprocket.

its also better to buy a complete kit if

you are going to modify the moped. the kit

should come with jets for the carb to make the mixture richer.

use 92 octane gas and the best two-stroke

oil you can get. go to a motorcycle shop and

ask the counter guy. on my mopeds i run it at 50/1 or 1 ounce or 30cc to 1/3 gallon gas

</HTML>

RE: Brand New Tomos Targa LX

<HTML>

The information provided by Leo is 100% incorrect with respect to sproket sizes. In reality, a smaller front sprocket will increase the rate of accelleration, but decrease top speed. A larger front sprocket will increase top speed at the expense of accelleration.

SteveM - P.S. I'm having trouble with the message board, so if I show up as having multiple postings, please forgive me.</HTML>

Brand New Tomos Targa LX

Winstarman /

<HTML>OK...early next week im picking up a brand spankin' new Targa LX, i need some advice from the army:

I intend to tune the hell out of this thing..what changes and gains will i see w/

1. biturbo muffler on stock engine.....(do i need to upgrade carb. jets with this?)

2. 60cc performance kit (carb, intake, head, cyl., exhaust.)

3. 70cc performance kit (carb, intake, head, cyl., exhaust.)

what brand oil is best to use in it? what about brands of gas? (mobil, exxon, texaco) im supposed to use 92 octane right? any other tips/sugguestions anyone can offer would be greatly appreciated.

can someone also explain the theory behind changing the sprockets?? what will modifying the sprocket counts in front and in back do?

what will help me get a high top speed, and what will help me get better acceleration...?

basically...im new to tuning mopeds, give me any advice that you think would help.

Thankz

</HTML>

RE: Brand New Tomos Targa LX

twowheelers /

<HTML>Check out www.members.tripod.com/twowheelers/TOMOS.html for tuning info and more..</HTML>

RE: Brand New Tomos Targa LX

<HTML>sir

here is the deal with the sprockets. if

you increase the number of teeth on the

countershaft sprocket(from the engine) it will make the moped accelerate quicker but

top speed will be slower. if you decrease

the countershaft sprocket teeth number you

will make the moped slower off the line but

overall top speed will be faster. the best

way is to increase the countershaft teeth

and reduce the rear wheel sprocket teeth.

its less expensive just to mess with the

countershaft sprocket.

its also better to buy a complete kit if

you are going to modify the moped. the kit

should come with jets for the carb to make the mixture richer.

use 92 octane gas and the best two-stroke

oil you can get. go to a motorcycle shop and

ask the counter guy. on my mopeds i run it at 50/1 or 1 ounce or 30cc to 1/3 gallon gas

</HTML>

RE: Brand New Tomos Targa LX

<HTML>sir

here is the deal with the sprockets. if

you increase the number of teeth on the

countershaft sprocket(from the engine) it will make the moped accelerate quicker but

top speed will be slower. if you decrease

the countershaft sprocket teeth number you

will make the moped slower off the line but

overall top speed will be faster. the best

way is to increase the countershaft teeth

and reduce the rear wheel sprocket teeth.

its less expensive just to mess with the

countershaft sprocket.

its also better to buy a complete kit if

you are going to modify the moped. the kit

should come with jets for the carb to make the mixture richer.

use 92 octane gas and the best two-stroke

oil you can get. go to a motorcycle shop and

ask the counter guy. on my mopeds i run it at 50/1 or 1 ounce or 30cc to 1/3 gallon gas

</HTML>

RE: Brand New Tomos Targa LX

<HTML>winstarman

if you just put a expansion chamber on

your moped you will need to increase jet

sizes to keep the motor from seizing up.

if will seize because the fuel mixture will

be to lean to lubricate the rings and piston

wall. go three sizes up on the main jets

for a start.

a properly jetted two stroke engine will

have a spark plug tip that is slightly grey

or brown in color. an overly rich mixture

will manifest itself as a black carbon mess

at the end of your sparkplug. a lean mixture

will have a white tipped spark plug.

ride your moped around after the pipe is

changed and if it acts funny shut it down and

look at the plug. if its making funny noises

be very careful you don*t seize it up.

before ya do all this modifying just ride it

around in stock form. the less modifying the

more reliable it will be </HTML>

« Go to Topic — end of thread

Want to post in this forum? We'd love to have you join the discussion, but first:

Login or Create Account