just got a 13 front and 27 rear new chain and chain tensioner what will this do to low end for starts

 

What is the stock gearing?

 

front 10 rear 22 but not positive on the rear

 

Ok so its an newer lt 80 because the older ones came with 12/26 and the newer ones have 10/22. Now you have 13/27. Here is the gear ratios witht he different gear set ups.

13/27= 2:07
12/26=2:16
10/22=2:20
The 13/27 will give you the best top end and the 10/22 will give the best low end.

 

thanks for help it is a 2005 lt 80 was looking for some more mid range power for corner speed also am having a power reed put in will this help

 

The 13/27 will give you more speed but you will lose bottom end. The power reed will help.

 

what gear set up do you think would be the best tack is 1.3 miles with 2 long straights and the rest are normal straichts with jumps and turns

 

For that long of a track, and with a stock motor, you will need to gear up. Somewhere around 14-15-16 front sprockets.
A reed may help slightly.
You may consider shaving the head .030 and removing 2 of the 6 front clutch rollers. This will bump up the compression and allow the clutch to have a slightly higher stall speed.
Study up before you waste alot of $$$ for bolt on things that don't help. [img]i/expressions/face-icon-small-wink.gif[/img]