This is a discussion on dyno #,s within the KLX110, DRZ110, TTR90 forums, part of the General Talk category; Originally Posted by adumb
wow by your numbers it seems that you are better of with the smaller bores. you can get your 130 kit ...
Originally Posted by adumb
Don't kid yourself, when all other things are equal there is an old saying: "There is no replacement for displacement."
It's quite possible to make a smaller motor make more power than a larger motor, or make a bike with a lower hp motor go faster than a larger motor. Mainly like W650 said, he has a different gear set and I'd assume 4th gear. With a 4th gear you can gear lower on the bottom and higher on the top. Both motors will (likely) be able to pull redline in top gear and if the smaller motor has a lower ratio gear set, he's going to go faster. He'd also likely get out of the hole faster due to the lower bottom end.
In other words: If they both had the same trans, head, and carb. The larger motor will make better power. When you start getting into custom work, it get's complicated.
01-25-2007 01:13 PM
Huntmod very nice.
I have a very similar motor to you. Mine is bore 65 and stroke 57.8
I love it. I have yet to take it to the dyno but I am ready. What are you using to monitor air and fuel. I have a meter called a lm1 it has a o2 sensor you put into the pipe and it will tell you everything. The best part about the meter is it will data log 44 min of riding so if you need to change anything it will let you know. I use this meter on our race cars to tune the carbs it works great.
191.8 what kit and or who did the work,piston? crank? rod? what head ? the dynojet dyno we used has a tube that you stick up in the exhaust for air fuel its all dynojet stuff. we tested 2 different fuels also, and both had about the same power but one had a lot smoother fuel curve your meter sounds neat how big is it and is it a wideband,1,3 or 5 wire, or what? phillip
I do all my own work I work for a company that makes pistons for motorcycles and cars. I have a good friend that has a machine shop so I do all of my work over there. As for my motor I made the pistons here at work and I had the crank done by Powroll. The head was done by myself. I have been porting heads since 1993 for honda drag cars. The valves I made and the springs and retainers I had a friend make for me. As for the computer I was talking about it is a 4 wire wide band o2 the unit it self is small enough to put near the oem cdi box it runs off of a 9volt or you can plug it into a socket for power when you go to dyno. The computer runs in real time or you can plug into your laptop to make changes. the unit is $349.00 and comes complete with everything you need to make it work. It is not bad and it is worth the money. what state are you in? I will be on the dyno monday hopfully if all goes well. If you are local you could come down and see how it works.
sounds cool, I dont make my own pistons or cams or valves yet ,but have modified them from different applications to fit. I stroke my own cranks and build my own sleeves,big bores and do my own head work ,seats, porting,decking,and either find parts that can be modified or have custom ones built. Im a machinist a a chemical plant in the beaumont tx area about 100 mi north of houston.have just got a mill and lathe at the house and lots of tooling but dont have it ready to use yet. still doing eveything after hours at work. I would like to get some imfo from you how do I get in touch with you email, pm ?
I've got Takegawa's wide band O2 sensor that I still need to sit down and install at some point, doesn't data log though.
What's the cost for custom pistons? : )
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