Some advice on our first motors needed. thanks

Discussion in 'General Questions' started by turnbacknow, Sep 16, 2010.

  1. turnbacknow

    turnbacknow New Member

    I'm looking at starting with four kits. from what ive read on here for my family the 2 strokers are the best way to go ( alot of dirt road, up hill and all around town type driving)
    I see people talking alot about Happy time ( hope thats the way its said, chinese 2 strokers :)) motors being a little unreliable and .. well.. cheap.
    i was hoping for some advice on our first four engine kits, we want something fairly inexpensive and fairly reliable ( i know, those two dont usualy go together)
    I have a few sites that sell 2 strokers but didnt want to post them as im not sure if thats allowed.

    any advice here would be fantastic.



  2. give me vtec

    give me vtec Active Member

    What kind of bikes are they going on and how much are you willing to spend?
  3. Al.Fisherman

    Al.Fisherman Active Member

    I myself like the Chinese HT's, not because of reliability but how it is mounted. They are a toy to me and I really wouldn't have motorized bike if it had to be a rack mounted.

    I have built 5 HT's, and nare a problem after the first build. The coil went out and I threw it together out of the box and blew a head gasket. The absolute, absolute most important thing is proper mounting. The second is to make a number of inexpensive out of the box modifications. Thirdly have fun.
  4. turnbacknow

    turnbacknow New Member

    thanks for the replies. the bikes are just cheap target mountain bikes, of course with the roomy open triangle space below the crotch bar. Ill have to look at the HTs, as far as how m uch to spend. i dont really know, i see them on ebay vor 150 or so, and am asuming that is the bottom rung in motors. i have to buy four of em, so i dont want to spend a glob if you know what i mean.
  5. Al.Fisherman

    Al.Fisherman Active Member

    Before you even open the first box, read the stickies on the different associated forums...This will eliminate many of the questions you will have and the "search" function is a good friend.
  6. turnbacknow

    turnbacknow New Member

    Last edited: Sep 16, 2010
  7. Al.Fisherman

    Al.Fisherman Active Member

    The bike will take it much longer then I could. I don't think real rough trails are what these HT's are cut up for. Although my son has been known to ride his on a moto cross track.
  8. Porkchop

    Porkchop Member

    Here's my 2 cents worth. If it were me, and due to my experience with motorized bicycles, I would not buy 4 kits to start with. I recommend you do your homework, very thoroughly and decide what kind of drive you want, meaning friction drive, chain, belt, frame mount, rack mount, etc. I would proceed to build one bike and see what you and your family members think about it and go from there. As far as engines, I don’t think anyone will disagree that any of the Japanese names, be it 2 stroke or 4 stroke would be a wise choice. I also recommend centrifugal clutches, which just about all the small Japanese engines come with. Also, I paid $200.00 for my Honda GX35, delivered. That’s in the price range of the HT engines, but I bet my Honda will last a lot longer and go way more miles than those China made 2 strokes with a lot less trouble. BMP has their Friction drive kits on sale now for about $100.00. That’s what I’m using with my Honda GX 35. It has about 500 trouble free miles on it. You can get that kit along with the Honda engine for around $350.00 or maybe a little less. You mentioned you’re going to use mountain bikes. Friction drives would probably be a bad idea if you plan on trail riding. First off, knobby tread rear tires and friction drives don’t get along together to well. The smoother the tire tread, the better they work together and the longer the tire will last along with less high pitch whining noise from the friction drive roller on the tire as well. You have many good reliable options. Again just do your research and home work here on the forum or were ever. Hope this helps !
  9. Esteban

    Esteban Active Member

    I would not suggest riding rough trails, etc., with a motorized bike, especially a HT kit !
  10. turnbacknow

    turnbacknow New Member

    thanks Porkchop, i should probably clarify about the trails. We live near Glacier park in Montana. so when i say trails, although steep, their all very well maintaned ( alot of them are even paved). Its not the really rough stuff that you see mountain bikers going on.
    Also Porkchop, from the research ive done ( yes i know i still have a LOT of reading to do) ive settled on an engine type that will fit inside the frame. I looked at the friction drives and what you mentioned is exactly what i thought. nobs and friction dont go well together. I dont however see a japanese made engines of this type. all i could find was this site that sells engines that have Japanese ballbearings INSIDE the engine. not sure if that means their HTs or not.
    as far as buying one first, the more i think about it the more I think your right. With me having no experience at all with these, and my two girls not sure how to operate one i think ill start with one and let everyone have a go at it. if you know of any chain drive, inside the frame engines that you like by all means please throw me a post or any info that i can use. till then ill keep searching.


  11. GearNut

    GearNut Active Member

    You have received excellent advice from everyone.
    If I may add, Do not buy any HT engine kit from Ebay!!!
    The HT or Happy Times engines are all a bit of a gamble. Due to the questionable quality control in manufacturing, a few lemons are boxed up and sold as good kits.
    After sale customer support is paramount with this situation. If you purchase your kit from a well known reputable vendor such as those that advertise on this and other forums you should get good support and warranty service. Do your research on the vendors you have chosen and narrow it down to the one you like.
    Here's a link to the vendor reviews:

    If you buy from an Ebay seller, what kind of support and warranty do you think you are going to get?
    Choose wisely.
  12. Al.Fisherman

    Al.Fisherman Active Member

    I've bought 4 off of E-bay, 1 from "luckyearlybird"...NEVER again, and 3 from (Powerking) also a vendor. I've had only one problem out of the 3 and that was a rear wheel sprocket was warped..1 phone call and at the door 3 days later... trashed the warped sprocket and didn't have to send it back. You WILL come across a bad one every now and then. Since I had good service from "Powerking" I'll continue to buy from him till the service degrades, which hopefully it won't.
    Last edited: Sep 17, 2010
  13. flashstar

    flashstar Member

    What you purchase should really depend on what you plan to use your bike for. I built a really nice 4 stroke HS cruiser type bike. It's great to use on the flat streets of Texas because it will cruise at 30 mph all day but the motor and 4G gear box are very wide and heavy. Don't expect to pedal your bike often.

    With a Morini or HT motor, you can pedal as much as you want but the HT's at least do not have comparable torque out of the box.
  14. Porkchop

    Porkchop Member

    Local State Laws

    One more note, check your local laws governing mopeds/motorized bicycles. I highly doubt any of the 50 states allow anything over 50cc engine size and 2 horse power. In my home state, there are laws concerning head lights, tail lights and brake lights as well. I’m 100% legal, never had a problem with cops, and don’t expect too. Also, don't skimp on safety equipment. Helmets, gloves, knee pads, elbow pads etc. Good luck !