Gears... 15/41 Stock v.s. 18/38 mod - Page 4

Jvacustoms · 09-14-2011, 11:24 AM

Would you go with the 42 or 43 setup ? I noticed you mentioned both, But I was unsure which one would give more desirable results.

EMGO muffler is there anything bad about it or you just like the stock muffler as I notice you didn't get an EMGO after you drilled your exhaust.

funds are somewhat limited but not too bad since it is a daily driver I have more money to upkeep it since I save so much money in fuel. about 70 a week savings so far but i am still only getting about 56 mpg.

I added 1Amp neons to the back of the bike and and they seem to draw little enough power that it doesn't over discharge the battery and I rid normally early morning and dusk (to and from work).

I have been interested in adding a small tach just so I know what is going on in there. any suggestions?

The front brakes had been acting weird and i figured out that the pad positioning pin is missing and a pad shim fell out as were the pads themselves.

I cleaned the brake line and reservoir with fresh brake fluid. and i have EBC fa106 pads. Waiting on the Pin and shim that I am missing to get it back out there on the road. the rear brake bar seems to be pointing at the air filter instead of that small area in the back that is supposed to be the gauge for when they need to be replaced. is there a way to know or readjust that to make the usage scale read right ?

it has Metzeler tires on it i am assuming from factory and I was wondering... when i look up the tire it says tubeless. but on spoke wheels i would think that they needed tube tires. can anyone shine some light on that ?

I have reclined the handlebars back and adjusted the brake fluid and mirrors back flush will that hurt anything ?

Is there a place to get highway pegs on the Cheap?

also I seem to recall a post on a gas gauge for the gz is that thing reliable ? and is there an easier step by step guide to make these ?

The front fender looks like it is warped and is not sitting even and aligned with the wheel can that just be adjusted by the 4 bolts that are on it ?

**jonathan180iq** · 09-14-2011, 03:56 PM

Muffler Swap
viewtopic.php?f=8&t=19

Tachometer:
viewtopic.php?f=8&t=533

If you just want to change one sprocket and keep the same chain just swap in a 40T rear sprocket and keep the 15T up front. That would give you a final drive gearing of 2.66. It would be an improvement on the highway over the factory setting (2.76) but won't be as drastic as the straight 16T swap (2.56).

I'm not really making a recommendation for one over the other. I'm just giving you ideas on what it out there. Doing just the rear sprocket swap would be easier and you won't have to change as many parts as you would if you went with a 16 & a 42/43.

Why I didn't upgrade the muffler at the time was simply because I got past the modding phase of my ownership very quickly. I just wanted a bike that was simple and reliable and I'm of the opinon that factory bikes are good enough for me, in most cases... (I've had to modify all of my Chinese bikes, but that's a different beast entirely.) I use motorcycles as daily drivers and beaters so for me, function is more important than form. And since I don't care about being loud, I just went with the factory exhaust system again.

mrlmd1 · 09-15-2011, 12:53 AM

Don't expect any of the mods you're considering to give you a significant increase in power, acceleration, or top speed, but they may reduce your gas mileage. You want a faster bike? -- get a bigger one.
There are innumerable threads on here about this, it has been discussed ad nauseum, so do a search on here and get educated before you mess up your bike.
Most people get 60-65 mpg. A dose of carb cleaner may increase your performance and gas mileage. Try that first.
There is no, nor has there ever been, a gas gauge for the GZ. Reset your trip odometer each time you fill up and refill at 150 miles or less and make sure the petcock is set to RUN so you have the 40 miles of RESERVE in the tank if you run dry.

**jonathan180iq** · 09-15-2011, 03:29 PM

Needle Shim Modification:
viewtopic.php?f=8&t=15

Sprocket Change:
viewtopic.php?f=8&t=317

Fuel Gauge Construction:
viewtopic.php?f=8&t=3823

Power Increase:
viewtopic.php?f=8&t=617&hilit=power+increase

Read all of the above threads. It should leave you with a very good ides of what our collective knowledge/opinons are in relation to what you want to accomplish. Some of them are quite long. But I still recommend you read all of it.

mrlmd1 · 09-15-2011, 06:36 PM

That will keep him occupied for a while and maybe he'll decide to leave well enough alone, and try the carb cleaner for a starter.

Jvacustoms · 09-16-2011, 11:34 AM

Quote:

Originally Posted by mrlmd1

That will keep him occupied for a while and maybe he'll decide to leave well enough alone, and try the carb cleaner for a starter.

I have cleaned the carb alot! I took it off ans scrubbed the crap out of it and have run an entire can of seafoam through the carb as well as i use enzyme ethanol treatment on every fill up it takes 5.5 ml for 3 gallons of fuel so i do exactly that everytime i fill up i watch the gallons v.s. the price then add 5.5 ml with a baby medicine syringe. I have had the carb tuned in by a bike mechanic nearby. That is not it...

Jvacustoms · 09-16-2011, 11:46 AM

As far as people telling me to get a bigger bike.... If i wanted a bigger bike i would have gotten one already I want to see what I can get outta this little bugger. I figure that people have to try things to find out if it is gonna work and eventually there will be a means of doing things that you would have never thought possible. I have a passion for tinkering and a lot of other vehicles to drive when i am not using this one because i am modding. I don't care if it takes time nor energy I am up for it I have been a mechanic for a long time and I refuse to think that any manufacturer has ever gotten maximum performance outta any product.

Jvacustoms · 09-16-2011, 11:48 AM

Does anyone know if the EMGO shorty i think it is 12" long from what i have read provides enough back pressure not to have to go to a main jet bigger than 130 ?

http://cheapcycleparts.com/products/218 ... al-muffler

**jonathan180iq** · 09-16-2011, 12:38 PM

Even with guys that run straight pipes, no one to my knowledge has ever needed anything bigger than a 135 on the GZ250.

We're talking open intake, open headers and everything.

Jvacustoms · 09-16-2011, 01:45 PM

Thank you, for the information.

09-14-2011, 11:24 AM	#31
Jvacustoms Senior Member Join Date: Jul 2011 Location: Eatonton, GA Posts: 237	Re: Gears... 15/41 Stock v.s. 18/38 mod Would you go with the 42 or 43 setup ? I noticed you mentioned both, But I was unsure which one would give more desirable results. EMGO muffler is there anything bad about it or you just like the stock muffler as I notice you didn't get an EMGO after you drilled your exhaust. funds are somewhat limited but not too bad since it is a daily driver I have more money to upkeep it since I save so much money in fuel. about 70 a week savings so far but i am still only getting about 56 mpg. I added 1Amp neons to the back of the bike and and they seem to draw little enough power that it doesn't over discharge the battery and I rid normally early morning and dusk (to and from work). I have been interested in adding a small tach just so I know what is going on in there. any suggestions? The front brakes had been acting weird and i figured out that the pad positioning pin is missing and a pad shim fell out as were the pads themselves. I cleaned the brake line and reservoir with fresh brake fluid. and i have EBC fa106 pads. Waiting on the Pin and shim that I am missing to get it back out there on the road. the rear brake bar seems to be pointing at the air filter instead of that small area in the back that is supposed to be the gauge for when they need to be replaced. is there a way to know or readjust that to make the usage scale read right ? it has Metzeler tires on it i am assuming from factory and I was wondering... when i look up the tire it says tubeless. but on spoke wheels i would think that they needed tube tires. can anyone shine some light on that ? I have reclined the handlebars back and adjusted the brake fluid and mirrors back flush will that hurt anything ? Is there a place to get highway pegs on the Cheap? also I seem to recall a post on a gas gauge for the gz is that thing reliable ? and is there an easier step by step guide to make these ? The front fender looks like it is warped and is not sitting even and aligned with the wheel can that just be adjusted by the 4 bolts that are on it ? Login or Register to Remove Ads
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09-14-2011, 03:56 PM	#32
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	Re: Gears... 15/41 Stock v.s. 18/38 mod Muffler Swap viewtopic.php?f=8&t=19 Tachometer: viewtopic.php?f=8&t=533 If you just want to change one sprocket and keep the same chain just swap in a 40T rear sprocket and keep the 15T up front. That would give you a final drive gearing of 2.66. It would be an improvement on the highway over the factory setting (2.76) but won't be as drastic as the straight 16T swap (2.56). I'm not really making a recommendation for one over the other. I'm just giving you ideas on what it out there. Doing just the rear sprocket swap would be easier and you won't have to change as many parts as you would if you went with a 16 & a 42/43. Why I didn't upgrade the muffler at the time was simply because I got past the modding phase of my ownership very quickly. I just wanted a bike that was simple and reliable and I'm of the opinon that factory bikes are good enough for me, in most cases... (I've had to modify all of my Chinese bikes, but that's a different beast entirely.) I use motorcycles as daily drivers and beaters so for me, function is more important than form. And since I don't care about being loud, I just went with the factory exhaust system again.
	0

09-15-2011, 12:53 AM	#33
mrlmd1 Senior Member Join Date: Jan 2008 Location: Crawfordville, Florida Posts: 2,853	Re: Gears... 15/41 Stock v.s. 18/38 mod Don't expect any of the mods you're considering to give you a significant increase in power, acceleration, or top speed, but they may reduce your gas mileage. You want a faster bike? -- get a bigger one. There are innumerable threads on here about this, it has been discussed ad nauseum, so do a search on here and get educated before you mess up your bike. Most people get 60-65 mpg. A dose of carb cleaner may increase your performance and gas mileage. Try that first. There is no, nor has there ever been, a gas gauge for the GZ. Reset your trip odometer each time you fill up and refill at 150 miles or less and make sure the petcock is set to RUN so you have the 40 miles of RESERVE in the tank if you run dry. Login or Register to Remove Ads
	0

09-15-2011, 03:29 PM	#34
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	Re: Gears... 15/41 Stock v.s. 18/38 mod Needle Shim Modification: viewtopic.php?f=8&t=15 Sprocket Change: viewtopic.php?f=8&t=317 Fuel Gauge Construction: viewtopic.php?f=8&t=3823 Power Increase: viewtopic.php?f=8&t=617&hilit=power+increase Read all of the above threads. It should leave you with a very good ides of what our collective knowledge/opinons are in relation to what you want to accomplish. Some of them are quite long. But I still recommend you read all of it.
	0

09-15-2011, 06:36 PM	#35
mrlmd1 Senior Member Join Date: Jan 2008 Location: Crawfordville, Florida Posts: 2,853	Re: Gears... 15/41 Stock v.s. 18/38 mod That will keep him occupied for a while and maybe he'll decide to leave well enough alone, and try the carb cleaner for a starter. Login or Register to Remove Ads
	0

09-16-2011, 11:46 AM	#37
Jvacustoms Senior Member Join Date: Jul 2011 Location: Eatonton, GA Posts: 237	Re: Gears... 15/41 Stock v.s. 18/38 mod As far as people telling me to get a bigger bike.... If i wanted a bigger bike i would have gotten one already I want to see what I can get outta this little bugger. I figure that people have to try things to find out if it is gonna work and eventually there will be a means of doing things that you would have never thought possible. I have a passion for tinkering and a lot of other vehicles to drive when i am not using this one because i am modding. I don't care if it takes time nor energy I am up for it I have been a mechanic for a long time and I refuse to think that any manufacturer has ever gotten maximum performance outta any product.
	0

09-16-2011, 11:48 AM	#38
Jvacustoms Senior Member Join Date: Jul 2011 Location: Eatonton, GA Posts: 237	Re: Gears... 15/41 Stock v.s. 18/38 mod Does anyone know if the EMGO shorty i think it is 12" long from what i have read provides enough back pressure not to have to go to a main jet bigger than 130 ? http://cheapcycleparts.com/products/218 ... al-muffler
	0

09-16-2011, 12:38 PM	#39
jonathan180iq Super Moderator Join Date: Jan 2007 Location: Dalton, GA Posts: 3,996	Re: Gears... 15/41 Stock v.s. 18/38 mod Even with guys that run straight pipes, no one to my knowledge has ever needed anything bigger than a 135 on the GZ250. We're talking open intake, open headers and everything.
	0

09-16-2011, 01:45 PM	#40
Jvacustoms Senior Member Join Date: Jul 2011 Location: Eatonton, GA Posts: 237	Re: Gears... 15/41 Stock v.s. 18/38 mod Thank you, for the information.
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