So simple so many problems lol . this site should be called motorised problems ...any thing that makes more than 250watt is illegal here so I can't win .I got a 4 stroke and needed to widen the crank .but it's super reliable .so many years fixing 66cc engines I get sick when I see one lol
Which is the best 80cc engine kit
- Thread starter Randy Garrity
- Start date
KCvale
In memory of KCvale 1959 - 2019
Hi Randy, welcome to the forum.
Did you know that hitting enter while you type does not finalize the post, it puts a line break in the text to make the whole post more readable?
I couldn't get through your first post for example ;-}
As you have learned in this topic already there is no such thing as a 80cc, most all are 66cc with the exception of the 70cc electric/pull start auto clutch Zelda with on-board power generation.
The company asked me to review a kit and sent me one all the way from China.
I was excited as hell but quickly disappointed.
It is a really fine engine that performs better than a typical 66cc, but I didn't have a battery in for the electric start so we tested it just using the pull start. Pfftt.. ~50 pulls and it broke and I don't mean the rope, the specialty plastic that actives it broke and their are no replacement parts.
So then I put a battery on and few more cool electric start rides on it and starter motor died, and again no replacement parts so it has sat useless for a few months now because there is no way to start it.
A great setup if they hadn't cheeped on those 2 crucial parts and I told them so.
If you want more details my topic with pictures about the adventure is here http://kcsbikes.com/topic.asp?TOPIC_ID=948 if you are interested in more details.
If your goal is something that really kicks ass, start with a Grubee Skyhawk GT5 engine, give it an expansion chamber exhaust, and make it a shifter via a SickBikeParts.com (SBP for short) jackshaft shift kit. http://www.sickbikeparts.com/catalog/index.php?cPath=21&osCsid=ddcppgjc4n7oao26rbo976r5g4
That combo of parts required the dual disc brakes if that is any indication of how quick and fast you can get with just a simple 2hp 2-stroke and gears ;-}
Did you know that hitting enter while you type does not finalize the post, it puts a line break in the text to make the whole post more readable?
I couldn't get through your first post for example ;-}
As you have learned in this topic already there is no such thing as a 80cc, most all are 66cc with the exception of the 70cc electric/pull start auto clutch Zelda with on-board power generation.
The company asked me to review a kit and sent me one all the way from China.
I was excited as hell but quickly disappointed.
It is a really fine engine that performs better than a typical 66cc, but I didn't have a battery in for the electric start so we tested it just using the pull start. Pfftt.. ~50 pulls and it broke and I don't mean the rope, the specialty plastic that actives it broke and their are no replacement parts.
So then I put a battery on and few more cool electric start rides on it and starter motor died, and again no replacement parts so it has sat useless for a few months now because there is no way to start it.
A great setup if they hadn't cheeped on those 2 crucial parts and I told them so.
If you want more details my topic with pictures about the adventure is here http://kcsbikes.com/topic.asp?TOPIC_ID=948 if you are interested in more details.
If your goal is something that really kicks ass, start with a Grubee Skyhawk GT5 engine, give it an expansion chamber exhaust, and make it a shifter via a SickBikeParts.com (SBP for short) jackshaft shift kit. http://www.sickbikeparts.com/catalog/index.php?cPath=21&osCsid=ddcppgjc4n7oao26rbo976r5g4
That combo of parts required the dual disc brakes if that is any indication of how quick and fast you can get with just a simple 2hp 2-stroke and gears ;-}
Steve Best
Well-Known Member
Good advice from KC but I'd suggest to start simple Randy.
Buy from a reputable supplier (I liked Grubee) and install it as designed. No mods at first.
Get it running and break it in at 24-32:1 oil mix. Takes about 3 tanks of fuel to break in.
I had no problem getting 30mph or more with the completely stock 66cc Grubee Skyhawk.
Pay careful attention to:
1) rear sprocket centered and running true. Tighten bolts carefully to get true.
2) Chain alignment from motor to wheel, very important.
3) Chain tensioner snog so it won't come loose, and of course in line and slight slack.
Run the motor as is for 3 tanks, but some jets for the carb, 68 and 65 will do. try them. Stock is 70.
This should keep you happy for a couple months...
Steve
Buy from a reputable supplier (I liked Grubee) and install it as designed. No mods at first.
Get it running and break it in at 24-32:1 oil mix. Takes about 3 tanks of fuel to break in.
I had no problem getting 30mph or more with the completely stock 66cc Grubee Skyhawk.
Pay careful attention to:
1) rear sprocket centered and running true. Tighten bolts carefully to get true.
2) Chain alignment from motor to wheel, very important.
3) Chain tensioner snog so it won't come loose, and of course in line and slight slack.
Run the motor as is for 3 tanks, but some jets for the carb, 68 and 65 will do. try them. Stock is 70.
This should keep you happy for a couple months...
Steve
well, ive worked on four strokes and ive worked on two strokes. given my experience with four strokes are lawn mowers mainly. there are many more parts on a four stroke, so if its made well and you dont need to mess with it, yes its reliable, but at the cost of speed, for me legallity, and the ability to easily mod it. but ive been using the same grubee engine for quite some time now, and after making a few adjustments and improvements its actually quite reliable. other than the air filter falling off because i didnt tighten it enough, and the headlight dieing because its cheap and chinese, the engine has been running for months, and i go everywhere with it, sometimes i just ride for the hell of it. ive gone through over 3 gallons a month and its still running like a champ. plus you really cant beat the price of these engines. their dirt cheap.
KCvale
In memory of KCvale 1959 - 2019
Yep, I don't recommend a rookies first build start with a Jackshaft shift kit, they are not the least bit friendly to assemble without insight of how they work and the right tools to even be able to do one , which is why you don't see many builders of them.
Once you get familiar with the 2-stroke engine from a DD build or two it's just a couple extra steps as you go to next time to take the machine to the next level.
Similar threads
