I’m wondering what methods guys have for adjusting the position of seat posts. With a driver that grows at least one seat size per year I find myself constantly coming to this question. In the past I’ve tried a Stone seat spreader, an old axle and a mallet. I stopped using the axle leverage method last year after starting to open two welds. I’m still not all that comfortable with my choices.
Right now I’m faced with a brand new chassis with an opening of 13″ that needs to end up at 14 3/8. After opening it to about 13 1/2″ I can already see a slight discoloration in the powder coat around the welds. Does anyone have a great method for doing this without compromising those welds?
I prefer to use a 5# deadblow hammer. I’ve also used an axle but it does leverage the weld a little more from what I’ve seen. When you have to move the strut more than an inch you can expect the paint to crack but I’ve moved some almost 2″ without issue.
I use a combination of deadblow hammer, crescent wrench ( attitude adjuster)
Another real mechanic’s hammer ( Snap-On or MAC ) rubber coated to support and counter weigh the impact from the other hammer ( this is the only way that works for me to avoid cracks at the welds ( you have to support from the opposite side you’re hitting at )
I have to move the right strut by cutting it off and re-welding on every kart I’ve owned. You have to pay close attention to engine clearance. For bending the left one, I use a pipe with U bolts and move it around to get a wide bend. You have to careful where you’re bending it not to kink it and check the welds after.
FAA certified jet engine and aircraft technician,
Nicholson Speedway class champion 2001,
Yamaha KT100 Service Center,
41 years karting experience