Crashaholic
Husqvarna
Pro Class
I've been thinking about a chain tensioner for my 75 450 for a few months and finally got the bug to proceed. I tried a universal tensioner but it looked mickey mouse so I decided to build one like a tensioner on the early 80's Huskys.
I'm at a point that I need to purchase the spring and with my nature to second guess everything do I can't bring myself to decide on a spring rate. I could spend $40 and buy five different ones but I don't feel right unnecessarily throwing money at something, even if its at my Husky. So I'm looking for someone who has an early 250, 430 with a chain tensioner, and a calipers, to gather a few measurements for me.
1. The wire diameter.
2. The number of coils.
3. The degrees of wrap around the spring hub to reach the arm that has the tensioner wheel. Is it 90 degrees, 180 degrees or what?
4. Whatever info you think will help with a spring decision.
The pic is a templet of the tensioner mounting plate from the left side of the bike. Its bolted on the two front chain guard brackets. Let me know if you see something that I've overlooked that may cause a failure or may not work in the first place.
The reason for this project is due to longer shocks and the 75 WR swingarm shock mounts are about an inch forward compared to the older swingarm design. This causes the shocks to mount at less of an angle, more straight up and down. This lowers the axle, or raises the seat height depending on how you look at it, creating more chain slack.
I've got other pieces fabricated so maybe I'll post some more pics, after I take a nap.
I'm at a point that I need to purchase the spring and with my nature to second guess everything do I can't bring myself to decide on a spring rate. I could spend $40 and buy five different ones but I don't feel right unnecessarily throwing money at something, even if its at my Husky. So I'm looking for someone who has an early 250, 430 with a chain tensioner, and a calipers, to gather a few measurements for me.
1. The wire diameter.
2. The number of coils.
3. The degrees of wrap around the spring hub to reach the arm that has the tensioner wheel. Is it 90 degrees, 180 degrees or what?
4. Whatever info you think will help with a spring decision.
The pic is a templet of the tensioner mounting plate from the left side of the bike. Its bolted on the two front chain guard brackets. Let me know if you see something that I've overlooked that may cause a failure or may not work in the first place.
The reason for this project is due to longer shocks and the 75 WR swingarm shock mounts are about an inch forward compared to the older swingarm design. This causes the shocks to mount at less of an angle, more straight up and down. This lowers the axle, or raises the seat height depending on how you look at it, creating more chain slack.
I've got other pieces fabricated so maybe I'll post some more pics, after I take a nap.
