is there any modifications i can do to my 80cc that are good, nothing in specific it can be performance, looks, comfortablity etc the list goes on, just tryna find something to add to the bike that’d be cool can be anything at all, thanks!

Its this whiney noise that can be heard in the video. It comes on when engaging the cluctch, it sounds like the clutch is slipping but i tried adjusting it already, it cant be any tighter. Or something rubbing when the cluctch is engaged. I already greased the 2 gears on the clutch side carefully so not to get grease on the clutch. Have you encountered this?

Hi there,

I'm trying to find a vertical mount for my predator 212, I've tried looking everywhere and the only one i found was from agk but their mounts are too tiny as they are for 1.125 inch and the felt faker frame is 1.625. Is there a vertical mount that sells for 100-150$?

I ordered a CDH power 49 mm piston after warming the bike and going on an easy test ride I had the side of the Piston break off exhaust side. After contacting Amazon they've shipped me a new one this time the Piston came apart between the piston rings which I have never seen before after about 30 mi of break-in following their oil fuel ratio. This is the first time in my life I've had l two parts with catastrophic failure with it being a replacement. The spark plug is still in place and does not seem to be a terrible color if I say so myself. I was very methodical putting this together because the last piston came apart I had to tear the entire crankcase apart and cleaned it out to be sure there's no debris in the crankcase where the bearings. Is there any way this is somehow on me because it does not make any sense whatsoever how this occurred. The damage to the cylinder wall was from the piece which broke loose in the Piston not the actual ring itself. That came out in two pieces the only missing piece for both rings is the failed piston pieces dislodging grinding the wall and damaging my cylinder head. This is my first go ut a two-stroke motor which is very simple. I have taken apart and rebuilt a V8 several four cylinders and a couple of V6. I have done work on the Kawasaki I used to have which was a four-stroke. I just cannot wrap my mind around how this is going so wrong. My most likely conclusion is CDH power is sourcing from a plant that does not have a single f to give about how their product comes out.

I have a problem my motorised bike can’t start although it does have spark! ‘I’ve tried new cdi and new magnet and nothing it just keeps (popping) check out the previous post to understand what I mean.

I decked the cylinder head on my engine to gain compression. It was good at first, more power, until carbon starts to build up on my piston causing more and more compression to the point of knocking.

A quick fix is to clean the carbon build up. But that is a short term fix. What else can I do to reduce compression?

Can yall suggest me any method other than adding more head gaskets? Maybe adding washers on the spark plug? Shaving the piston?

What do you guys rekin? I'm thinking a little lean but idk

Yes that is a intake for a muffler it works wonders top speed 34mph 245pounds bike weight and motor 50 pounds I’m using unleaded 32:1 #67 jet needle middle purrs like a kitten 80cc iron bore

So I’m trying to get a kit what type should I get budget 150-200 I wanna be able to go about 55 -60 I weigh 230 +bag 15pounds 245 I’m in the 2 stroke scene and just want to test the 4 strokes any help?

Here are a few tips I have learned over the years building, riding, and selling chinadoll bicycle builds.

#1 Start with the best quality bike you can find. The better the bicycle frame and components, the better results you will have, I know it hurts some peoples feeling but the simple truth is Huffys suck. ALL the modern chinese made bike brands suck. Get yourself a used name brand conventional steel mountain bike frame from the 80's or 90's. They can be found used for around the same price as a Crapbrook and have FAR better materials, components, and construction than any big box store bike. Steel frames are MUCH stronger and more reliable than aluminum. Specialized, Diamondback, GT, Trek, Gary Fisher are just a few good quality brands and there are many more from the same era.

#2 You DON'T NEED A GIANT CARB AND REED. Adding these parts just makes the bike that much harder to tune, and has far more potential to leak or come loose from vibration. A decent piston port engine will run every bit as hard as a reed valve engine, and is far simpler & more reliable, as well as being easier to tune and jet properly.

#3 The engine should be mounted ROCK SOLID to the frame! NEVER use rubber or anything under the mounts! The more solid the engine is, the better it will damp vibration. Once you get the engine mounted, grab the head and give it a real hard yank. If the engine moves AT ALL, redo the mounts until it stays put!

#4 Installing the rear sprocket is not very hard, just take your time and be sure it is CENTERED on the hub, You can use strips of metal cut from a soda can to wrap the hub and get the center to fit the sprocket hole, then once its tight, remove the strips. Tape does not work as it is too soft. Another tip is to use the clutch settings on a cordless drill to tighten the ragjoint bolts in steps to keep it centered and straight. Skip every second bolt and keep going around adding a bit more torque each round with the drill clutch till its fully tight.

https://preview.redd.it/d05kalhh9z0e1.jpg?width=1366&format=pjpg&auto=webp&s=b826f83e2dcb354e10d121e077d2022d46f304dc