Should I test a new nut for the specified torque after I use a die on it befor I go any further? I dont want to get the cases back together and find out it wont hold.
Should I test a new nut for the specified torque after I use a die on it befor I go any further? I dont want to get the cases back together and find out it wont hold.
Is there a chance amachine shop can fix it or should I buy a used crank off ebay?
I think you will be ahead of the game if you just find a new bottom end and save your existing unit for parts
Joker 90
1970 Honda US90- aquarius blue
1981 Yamaha YT125
1986 Yamaha Big Wheel 80
1986 Kawasaki Tecate KXT500
1987 Kawasaki KXT250B2
2005 Yamaha YFZ450
I measured the threads at 20mm but can anyone tell me the pitch?
If you dont get it before I get off work I'll get it for you.
The bad thing is though, once the material is gone in those threads a die will only remove more.
Your tightening strength is severely compromised. You can't use normal torque and it may come apart at a very inconvenient time and place.
Alan
1985 350x
1984 200es Big Red
1985 200s (little red)
1986 200x saga
2) 1985 350x projects
And a slew of others to hold my attention
Can a machine shop do anything to add material back? I dont see any complete bottom ends on ebay with a claimed working crank and trans.
I do see some cranks for around $60-$80 that are described as 'working' so I may just do that.
A machine shop could do that but the cost might be prohibitive compared to another crank. And they would really have to know what they're doing.
Last edited by AMK; 01-29-2018 at 10:18 AM. Reason: Punctuation
Alan
1985 350x
1984 200es Big Red
1985 200s (little red)
1986 200x saga
2) 1985 350x projects
And a slew of others to hold my attention
As I see it these are your 3 choices...
1) buy that die and rethread what you've got and further compromise its integrity. And revisit this repair with much more cost.
2) have a machine shop turn the old threads off, heat part to build up with Nickel rod. Re-turn stub and rethread. Then re-heat treat to its original hardness. All at $90.00+ per hour.
3) buy a good used crank.
I'd buy a good used crank and be done with it for 30 more years.
Last edited by AMK; 01-29-2018 at 11:30 AM. Reason: Not 100% sure on the $90.00 per hour.
Alan
1985 350x
1984 200es Big Red
1985 200s (little red)
1986 200x saga
2) 1985 350x projects
And a slew of others to hold my attention
Thanks for the advice. I just made an offer on a crank on ebay.
Crank is on the way so I will continue the tear down to see what is up with the trans.
Didn't read all the posts but if you didn't already figure it out that nut has backwards threads, it turns right to take it off, not lefty loosey!