4 speed manual clutch motor z50
- Thread starter Marcus
- Start date
Marcus
Member
I was just thinking about putting a ct70 motor in it..aren't they 4 speeds with a hand clutch? I took the z50 for a long ride today and it got really hot and quit running..do you think I damaged anything? Or are they pretty durable. Also what is the correct needle position and fuel/air screw setting?
OLD CT
Well-Known Member
It's not good to take a fresh rebuild for a long ''first'' ride. It should be taken out for 15 minute short rides and cooled off. Now you need to take it out for a 15 minute ride, come home and dump the oil and put fresh 4 stroke M/C oil in. Ride it easy don't run it full throttle just yet. Change the oil frequently! You are going to see a lot of fine metal in the oil, don't panic. You have to change it often in the beginning. 4 speed CT70 engines are not easy to find, and if you do they are going to run you some big bucks.. $1000.00+ easy, if it's rebuilt already.
If you are buying a used core engine it will cost around 800 bucks in parts, plus whatever you pay for the piece of crap. Consider buying a ''basic'' 88cc kit, that's close to $150 and a $150 4 speed AHP transmission + a $165 trailbikes 4 speed manual conversion kit. That's $465.00 worth of shit right there to add on to all the money you already dumped in to it. Don't buy someone else's used headache. Build your engine up.
If you are buying a used core engine it will cost around 800 bucks in parts, plus whatever you pay for the piece of crap. Consider buying a ''basic'' 88cc kit, that's close to $150 and a $150 4 speed AHP transmission + a $165 trailbikes 4 speed manual conversion kit. That's $465.00 worth of shit right there to add on to all the money you already dumped in to it. Don't buy someone else's used headache. Build your engine up.
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OLD CT
Well-Known Member
Didn't you just put 2 brand new Honda 3 speed shift forks in that engine? I wouldn't want to take them out and have 100 bucks + shipping, laying on the shelf... Enjoy it as is for a while.
There is no exact setting, it depends on what the plug looks like and how it runs. I do however like to tune the carb with ''jetting'' to run good with the clip in the middle. The A/F setting in a book is just a starting point!
You have to warm the engine with that book setting turn the idle down real good to ''hear the change'' then turn the A/F screw slowly in either direction till you achieve the highest smoothest idle, then turn it 1/4 clockwise. P.S. I don't own any Z50's but understand basic carb tuning. You may need to re jet a little, not sure yet. Try 1 1/2 turns out from ''lightly seated'' for a starting point only. If you ''crank'' the A/F screw 'in'' too tight you could damage it internally.
There is no exact setting, it depends on what the plug looks like and how it runs. I do however like to tune the carb with ''jetting'' to run good with the clip in the middle. The A/F setting in a book is just a starting point!
You have to warm the engine with that book setting turn the idle down real good to ''hear the change'' then turn the A/F screw slowly in either direction till you achieve the highest smoothest idle, then turn it 1/4 clockwise. P.S. I don't own any Z50's but understand basic carb tuning. You may need to re jet a little, not sure yet. Try 1 1/2 turns out from ''lightly seated'' for a starting point only. If you ''crank'' the A/F screw 'in'' too tight you could damage it internally.
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