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The cam I use has no compression release, and I knew the starter I had would be short lived. It let out the magic smoke today(and a lot of it!) and now I gotta replace it. Anyone have one sitting around for sale? WTB!

Parting out my GX200, Only been using my heavily modded GX390 lately. All prices are without shipping. Shouldn't be more than $5 since most fit in flat rate boxes. All items are "or best offer". No lowballs pleaseee! First up, the head. Recently painted with 500 degree enamel in Iron gray. No...

Looking to get my heads milled on both of my motors and I'm curious to see if anyone will give me a combo discount for doing both. The gx200 is a Honda 14cc head and the 390 is a HF clone head. May eventually go bigger valves on the 390. How much for milling both heads? Individually? One and...

Whats the worst condition harbor freight took your engine back on warranty? My friend has his engine which hes about to return because when he was just riding it at probably around 3500 rpm, it snapped the rod cap and threw the piston into the valves. Just spins free now. Only had the gov...

I haven't the slightest idea why... I was able to turn 7500 on a regular clutch last year and hit 55mph. Ive since taken it apart and cleaned it up, put it back together and it runs fine. Revving without load, it sounds way lower rpm than it used to, and I can only hit 39mph with similar gearing...

Im looking to upgrade to hydraulic breaks but I am worried about the extra length that I've added. Ive extended the doodlebug to +14" and I dont know if its possible or not to extend the hydraulic brakes sold by promod. Anyone know if/how it would be possible to find a solution to this? I was...

So my 34mm mikuni flat-slide keeps dumping fuel out of the bottom drain tube. I use it along with a fuel pump on my 390 and it doesn't start dumping until i give it some throttle. It'll idle fine, no dumping, until i give it throttle, and then all it does is dump like crazy.. I'm not sure how...

Well heres my current project which will be done with a few more modifications. I bought the frame off of a friend for $50. all it had was the steering assembly. I had planned on using a gx390, so the engine plate had to be moved up a level, and right about 7" to fit space for the...

I know you cant be perfectly accurate without a dyno, but I just want to know what i should be expecting out of mod parts on a 390.. not sure what each part is estimated to increase by. any rough estimate is much appreciated. stainless valves ported the ports to a flat smooth transition isky...

So I have a 200 w/ all of the mods, mikuni, billet parts, 1.3's, high lift cam, stainless valves+26lbs springs, ported, flat top piston, etc. I just bought myself a 390(i know, its a clone..) which I'm looking to put a lot of work into. Ill be using this on my green extended doodlebug drag bike...

Well while I'm waiting for parts for the quadkart, I figured why not install the engine+tav on my bike. I just got a 54t sprocket too so that should be a bit more fun as well. :-) By the time the sun went down I had just finished mounting it so I'll have a video up of it running tomorrow or...

So after an incomplete build on my last go kart, and having found a quad frame and 250cc engine for $80, I chopped up the quad, put a riding mower seat in the middle, bent down the steering, threw an engine plate on, and now I'm up to something rideable, but theres stuff I still need to finish...

Not exactly sure what is the culprit here. I recently changed my custom ground cam profile to close the intake at the bottom of the intake stroke where it had previously been closing half way up the compression stroke(ack!) so now I know the reason why I could run on regular, and why I now...

So.. it came today! :-) It was a PAIN to install! Its such a hard rubber that the bead WOULD NOT go around without pulling the rim through to the inside of the tire. I had to eventually lean on a concrete wall, stand on it with all 220lbs of my weight with both feet, and use a crowbar...

YouTube - DB-30 Drag Bug - Speed testing with new billet flywheel and 1.2 rockers. Something is up with the quality.. Should look tons better than it does. Anyway, mods are listed in the video. Runs pretty well for whats in it. :-) Very smooth once I pass 40mph. The gearing needs to be...

I havent been able to get on in a week or so and I want to see the new stuff that they apparently added(got the e-mail). Anyone else having a hard time?

I've tuned my carb to what I believe is correct. I got a good plug reading, I hear no backfiring, and it runs fine. How can I be sure that it is tuned to the best possible? Any tips from people who are good at it?

I'm almost finished with this now! Woot. I just need to buy myself that billet flywheel, repaint some areas(poor planning and ideas to be done after I painted), buy a new clutch, hydraulic breaks, and i'm set. Since my last post I've: Made a new exhaust pipe Added foot pegs Added a carb brace...

Hey all. Just a few questions on engine starters. Did you buy yours or make it yourself? If you bought it, are there any sites to get some ideas from? I'm going to try to assemble my own, on the cheap, to start my engines instead of using a pull start. I have a briggs starter motor with a...

I've been wondering if it would be of interest to some forum members if I were to make and sell stainless 4"x6" and 4"x12" stainless tube tanks, unless somebody is already doing so. They would cost somewhere between $60 to $85 a piece, depending on size. They'd come with fittings and gas caps...