23 tooth gear

[superb]

I dropped to a 23 tooth gear on my apex and I get 2 miles per gallon worse gas mileage. Went from 17mpg to 15 mpg. Is this possible?

 

[F7 Racer]

Sure.......you are now in a more inefficient place for that drive train and motor combo........Thats what those $100K a year engineers get paid to figure out, stuff like that !!

 

[aceltx09]

I wouldnt be complaining with either 15 or 17,you should be happy I get about 12mpg 23-38

 

[light200]

the question i have is have you noticed any performance gain or loss? better top speed? better low end?

 

[superb]

No difference what so ever

 

[snowbiscuit]

Also went to 23 top on 06 RTX and had the same results, not as good MPG and little if any performance gain

 

[mcullin1]

I have a 2006 Apex GT and I also put a 23 tooth sprocket in my sled and an ulmer clutch kit. Made a tremendous difference low end and mid range.

 

[Yamadogger]

I had the same results as mcullin1 with much improved bottom & mid. Now, this is very unscientific data but basing it on running vs. my friend's F8, I pull him by a significantly bigger margin than previously. This is based on multiple runs on different days in different conditions so I think it's due to the gear drop. Also, I saw no decrease in mileage but I also put a white secondary spring in at the same time and wrapped it at 60% vs. the stock 70% wrap with the green spring. My cruising rpms seem about the same as before. When I fill up now I'm still within a couple tenths of my wife which is where I was before the gear change. She always takes just a little bit less due to the weight difference and my inability to ride more than a half mile without giving a little WOT blast.