79cc Monster 80 Bike Engine Kit - Complete 4-Stroke Kit
- Thread starter darkcobra94
- Start date
Just bought a 80 cc 2 stroke off ebay. worked good at first but now it won't start., does anyone know what replacement spark plug I can use other than one off ebay?
If you have 'slat head', meaning the spark plug does not go strait up, the best plug you can get is an NGK 5944 (BPR7HIX) Iridium spark plug.
You will will not have to mess with again, and why I put them in all my new builds.
Will 79cc four stroke need a bigger or smaller jet size than a HT engine? Looking to reuse my NT carb.
Thanks KC. I still can't get my 80 cc to start, I tried everything I could think of, except check the woodruff key. How do I take off the magnet? Will I just use a puller for that? Thanks
I actually built those. I took measuring calipers to measure the tubing where i wanted the brakes to sit and i bought split shaft collars for the project. I had some parts bikes that i took the brake bosses from and i welded it all up. Stopped like a champ
Also look up these. I saw this a couple years ago after i already built mine
Identiti Clamp-On Brake Mounts
I have a Lauson motor and he made my flanges, will be using baseball bat tapered tube to finish the rest. Nice work .......Curt
I actually built a nice 79cc 8 speed bike. Turns out, with a little modification, Sick Bike Parts' four stroke shift kit is strong enough to be used in a 79cc build, with each of the two parts being 1/4" plates. On the other hand, I did couple the Monster 90 kit with this shifter, so it came with an exhaust pipe and an air filter. I did pay a little extra for the kit, and yes, it is overpriced, but I got all the parts I needed without needing to search for them, and it all came in one package. I also chose to do the kit for the simple reason that I would be searching for other parts relating to the frame, such as a suspension fork, wheels, disc brakes, and electronics controls (not to mention parts and bargain prices).
There were a few things that I didn't use, and a couple things that are used, but not for their intended purpose. For example, I'm using a spoke from a wrecked bike as a linkage arm for the throttle, bypassing the governor, and a bushing on the crankshaft as a spacer to keep the clutch off the transmission plate bolts. I also upgraded the chain to a jt sprockets motorcycle power transfer chain, sized #420. Never had an issue with that like I did with the stock #415.
I personally, after having put about $1300 into the bike, have decided that this engine is too underpowered with so few upgrades available that its not worth the hassle. I would rather pay for a 250cc vtwin for $1000 (has a charging system), a micargi Seattle, and all the parts fabricated or bought as necessary to make it work. BTW, I'm working on a cad model of a mount I thought of for the 250cc vtwin lifan, and will present it when its a completed product. But I will say this about it, it will utilize the whole flat part of the downtube, and the whole seat tube, with three mounting points each.
There were a few things that I didn't use, and a couple things that are used, but not for their intended purpose. For example, I'm using a spoke from a wrecked bike as a linkage arm for the throttle, bypassing the governor, and a bushing on the crankshaft as a spacer to keep the clutch off the transmission plate bolts. I also upgraded the chain to a jt sprockets motorcycle power transfer chain, sized #420. Never had an issue with that like I did with the stock #415.
I personally, after having put about $1300 into the bike, have decided that this engine is too underpowered with so few upgrades available that its not worth the hassle. I would rather pay for a 250cc vtwin for $1000 (has a charging system), a micargi Seattle, and all the parts fabricated or bought as necessary to make it work. BTW, I'm working on a cad model of a mount I thought of for the 250cc vtwin lifan, and will present it when its a completed product. But I will say this about it, it will utilize the whole flat part of the downtube, and the whole seat tube, with three mounting points each.
does anyone know if the transmission plate from gasbike for this 79cc will fit on the bigger 212cc? or is the chain from the clutch to back sprocket straight/aligned enough? in the parts gathering/returning/buying again.. stage of my build maself with a 208 cc gx200 clone....
only asking cause i foolishly bought the wrong tav2 for my bike and now trying to decide or selling it or returning to seller...
only asking cause i foolishly bought the wrong tav2 for my bike and now trying to decide or selling it or returning to seller...
I'm new to the world of 4 strokes, and I, just today, finished assembling the Monster 90 kit with the Metallic green Kulana bike it came with. Gasbikes got it to me quickly, (just not the rest of my order). After several hours of YouTube vids and 90 min of failed attempts, I hate the stock carb and want to rip the governor out of the motor just for spite. So I'll read all the links posted above and start modifying. Wish me luck...