- Joined
- Sep 25, 2009
- Messages
- 2,507
- Age
- 69
- Location
- West Des Moines, IA
- Bike
- 2022 Kymco AK 550
- 2024 Miles
- 006549
Today I went out for a Thanksgiving Day ride for the very first time since I've been riding. Due to family scheduling we are celebrating with the turkey dinner on Saturday. My son and his family are celebrating that today by having his in laws over at his place.
Just finished replacing the rear tire on my AK so I needed to take it out anyway to check out if the balance beads are good and if I aligned the belt right, etc. First time for replacing the rubber myself. First time for using balance beads. First time for owning a bike with belt drive and adjusting the belt/sprocket alignment. I discovered that the TPMS may be off a little more than I thought. After getting the tire bead set using up to 80 psi I adjusted the pressure back to 42 psi using a tire gauge. Then I mounted the tire on the bike and checked the pressure using the TPMS and found it was reading only 38.5 psi. So I double checked with the pencil gauge which was still showing 42 psi. I checked with a second pencil gauge with the same result. I know that pencil gauges are not really all that accurate but didn't think two of them would be off almost 4 psi. So I set the TPMS indicated pressure to 39.5 psi instead of the usual 40.5 psi. Not much change but closer. The manual calls for about 38 psi anyway and the tire sidewall says 42 psi max. I always like to go a little higher than what the manual says as long as I don't go over the tire max. I set the front tire to 37.5 psi. All of these pressures are +/- .5 psi so the readings will vary. It is very hard to get closer than +/- .3 psi with this TPMS. Close to those numbers is close enough given the accuracy of the gauges.
I rode slower roads at first just to get a feel for the new rubber. Then I increased the speed a little at a time choosing roads that were progressively faster. Near the end I finally jumped on the Interstate for a fast run at just over 65 mph. All is well. The tire ran very smoothly. I ended up with a total of about 35 miles. Temp during this ride was around 47 F. The handlebar muffs were left on (I was too lazy to remove them) and my hands were a little more than warm as a result.
When I returned home I immediately felt the hub and axle of the rear wheel just to be sure it wasn't heating up and it actually felt cool to the touch. I think I got it right. I also checked where the drive/timing belt was running on the rear sprocket. Originally, from the factory, the belt was riding close to the outer edge of the sprocket. But still 1-1.5 mm from the edge. The spec is a minimum of 1 mm. After the ride I found the belt was about 2-2.5 mm from the inner edge of the sprocket, or just inside of center. I wanted it centered. So I did some more adjusting and got it to ride in the center of the sprocket. This was done by adjusting a little and then running the bike on the center stand for a while at around 4000 rpm. Then checking and adjusting again and running again. Will see if this stays put under power on the road.
Just finished replacing the rear tire on my AK so I needed to take it out anyway to check out if the balance beads are good and if I aligned the belt right, etc. First time for replacing the rubber myself. First time for using balance beads. First time for owning a bike with belt drive and adjusting the belt/sprocket alignment. I discovered that the TPMS may be off a little more than I thought. After getting the tire bead set using up to 80 psi I adjusted the pressure back to 42 psi using a tire gauge. Then I mounted the tire on the bike and checked the pressure using the TPMS and found it was reading only 38.5 psi. So I double checked with the pencil gauge which was still showing 42 psi. I checked with a second pencil gauge with the same result. I know that pencil gauges are not really all that accurate but didn't think two of them would be off almost 4 psi. So I set the TPMS indicated pressure to 39.5 psi instead of the usual 40.5 psi. Not much change but closer. The manual calls for about 38 psi anyway and the tire sidewall says 42 psi max. I always like to go a little higher than what the manual says as long as I don't go over the tire max. I set the front tire to 37.5 psi. All of these pressures are +/- .5 psi so the readings will vary. It is very hard to get closer than +/- .3 psi with this TPMS. Close to those numbers is close enough given the accuracy of the gauges.
I rode slower roads at first just to get a feel for the new rubber. Then I increased the speed a little at a time choosing roads that were progressively faster. Near the end I finally jumped on the Interstate for a fast run at just over 65 mph. All is well. The tire ran very smoothly. I ended up with a total of about 35 miles. Temp during this ride was around 47 F. The handlebar muffs were left on (I was too lazy to remove them) and my hands were a little more than warm as a result.
When I returned home I immediately felt the hub and axle of the rear wheel just to be sure it wasn't heating up and it actually felt cool to the touch. I think I got it right. I also checked where the drive/timing belt was running on the rear sprocket. Originally, from the factory, the belt was riding close to the outer edge of the sprocket. But still 1-1.5 mm from the edge. The spec is a minimum of 1 mm. After the ride I found the belt was about 2-2.5 mm from the inner edge of the sprocket, or just inside of center. I wanted it centered. So I did some more adjusting and got it to ride in the center of the sprocket. This was done by adjusting a little and then running the bike on the center stand for a while at around 4000 rpm. Then checking and adjusting again and running again. Will see if this stays put under power on the road.