Yeah, they are 27.4 inches tall. I decided to go with 25's. Since the stocks are really only about 24", 27.4's are way too much without a clutch kit. I am staying away from modding it, so I went with 25's. They are a true 25" tire, only a 1" increase. No noticible low end power loss there! I can't wait to get it. The owners manual says no more than 1/2 throttle for 10 hrs, but the service guy told me to very the RPM's throught the entire range, but no long continous rpm's at any level. Any other ideas?

 

thats the same as any bike. just dont hold it wot very long and very the rpms when riding and dont hold it steady for very long.