GW's Motorized
Well-Known Member
Did you balance the crank at all?
Ms460 carb help.
- Thread starter Sloppyslopster
- Start date
Sloppyslopster
Active Member
No. But I know that’s one of the things I have to do. Plus I don’t know how to do it.
When either of you find out how to balance a "crabk" just let me know so I can do it too...lol...lol...lol.
Amwicr
Well-Known Member
- Local time
- 5:16 PM
- Joined
- Feb 18, 2022
- Messages
- 1,185
I think he meant to say "crabcake"
Yes, vibrations are normal, especially on an unbalanced 2 stroke single. Even if you balance the crank it will still do it, all you do is change the rpm point where the misbalance occurs and raising it higher the rpm range than the engine normally operates in.
Sloppyslopster
Active Member
I think also my engine is vibrating because of it being to rich on the top end. Need to buy smaller jets.
Chainlube
Well-Known Member
The piston is too big and heavy, you'll need ten holes in your crank to offset that.
Sloppyslopster
Active Member
Maybe porting the piston will help reduce some of that weight lol. Honestly I'm happy with how it turned out overall especially since the thing doesn't leak. Again ill look into how I can balance the crank. While I'm at it I'll MAYBE port the piston and cylinder so I don't have to rebalance the crank again later on. Also funny enough with an unbalanced crank and everything, I got it up to 10k rpm (no load) and about 8k with load.The piston is too big and heavy, you'll need ten holes in your crank to offset that.
Think I might name the motor "Jankenstein"
robe
Well-Known Member
Great you have it running well. Just don't rev it up so high, when it starts to vibrate like mad, it is trying to tell you something. In motor speak it is saying back the heck off or I will blow up. Lol.
