I got my first motorized bicycle about two years ago, before I knew much of anything about engines. I ended up stripping out the hole for the head bolt. We fixed that, but had to make a bolt that would fit. That bolt broke, and there was no place to buy another like it, so the bike just sat for about a year and a half, give or take. My dad and I finally fixed that bolt, and as soon as I get new rings for it, I can try to start it up! I'll try and keep everyone updated with this, so plan on seeing some pics and a video.
Finally got that head bolt fixed
- Thread starter JTalley
- Start date
Rocky_Motor
New Member
You can buy new head bolts at sickbikeparts. Just have to find out what size it is. Did you torque your head bolts correctly this time around?
The bolt is homemade- a combination of two bolts, one that will fit through the head, and one that bolts into the enlarged hole on the engine "block." I haven't reassembled it yet, because I'm waiting to get new rings for it. What's it supposed to be torqued to? It's one of the 66cc Chinese kits.
Rocky_Motor
New Member
I torqued mine to 96inch pounds/8ft pounds. Some go higher. It's sort of the whole oil to gas ratio, a lot of people do it a bit differently. I don't think there's any real specifications for these engines sadly. But I would say the most important part of torquing them is so that they are all of equal torque.
If you dont have one, I got my torque wrench at harborfreight. Didn't want a cheapy but they were the only people that carried one that had inch-pounds
If you dont have one, I got my torque wrench at harborfreight. Didn't want a cheapy but they were the only people that carried one that had inch-pounds