Need your honest advice!

runnermike · Sep 26, 2013

So, Im wanting to build my first 4 stroke. My plans are to just purchase a HS142f 49cc kit and slap it on....ya know, get my feet wet before I dive in so to speak. But, the more I research, the more I want to "custom" build again.

I see that AGK has parts for the 49cc and the HF79cc. So, I guess my question is if I wanted to purchase the HF 79cc from harbor freight (there is one right by my house) is it really that much more difficult than the kit HS142f? AGK seems to have everything for the HF79cc I would need.

I just do not want to get in over my head and get discouraged is all.

I will have a rolling frame here shortly and am trying to get my ducks in a row...

Thanks in advance

culvercityclassic · Sep 26, 2013

I would do the 79cc myself. Like you said AGK has all the parts for it. Get the intake and upgrade the carb it's worth it.

From what I have seen you build you should have no problems.

Let me know if you have any questions....

runnermike · Sep 26, 2013

Thanks CCC! I think was has me a little hesitant is the whole "Jackshaft" setup. Never dealt with one before, but this sure is the place to come if I can in a bind......

runnermike · Sep 26, 2013

Are the 79cc predator and the HF 79cc the same engine?

MotorBicycleRacing · Sep 26, 2013

On sale for $99 and 20% off coupons are easy to find.
If you look harder you can find a 25% off coupon.

http://www.harborfreight.com/3-hp-79cc-ohv-horizontal-shaft-gas-engine-69733.html

atombikes · Sep 26, 2013

So are you guys still having luck honoring a 20% off coupon when the engine is also on sale?

culvercityclassic · Sep 26, 2013

I just worked the coupons when purchasing two 212. Used the coupon on one, then came back in and used another coupon with no issues.

shwnrttr · Sep 26, 2013

go with a predator. very good quality and cheaper than those garbage 49cc

Dan · Sep 26, 2013

Off topic but just happened to get these in an email if any one can use em.

I have one of those infrared thermometers and comes in handy even if just solving your curiosity.

http://widgets.harborfreight.com/ws...dium=email&utm_campaign=3913b&utm_source=1020

chainmaker · Sep 26, 2013

You won't be in over your head, my nephew just did his first bike with the jackshaft and HF set up. Never built anything before with Just the forum search for questions. You Can do it, those extra 30cc will make a difference.

Dan · Sep 26, 2013

Yes, what Chain said. Plus, even with all the mental calisthenics and hair pulling perfecting a DIY. It is way more fun and a far better learning experience and just plain cooler doing it all your self.

The biggest problem I have making mounts is that the rears tend to slip down. But made one with a vise and a drill press that I really like. Looks like the engine is almost suspended in the hole. (in my wee lil brain any way)

Here is a build thread of mine; http://motorbicycling.com/showthread.php?t=23871 I got some great input and help from folks here and hope it can be of use to you as well.

SKY120 · Sep 27, 2013

Good for a few more days!

Darren

MadMannArt · Sep 27, 2013

I'm kind of in the same boat... I want to put a 4 stroke engine in my frame, but do not want to spend 1000 dollars doing so...
The idea was not to have to pedal, not go fast..
I am interested in what you come up with...
So far I am very unimpressed with Don Grubee's offerings although it was more customer support than complete junk... they could have resolved my issue and had a satisfied customer... too bad

Dan · Sep 27, 2013

Cool, thanks Darren

shwnrttr · Sep 27, 2013

you can check out my build if you want some ideas for making a very afordable engine mount and jack shaft setup. i got the metal from the dumpster behind our hospital= free and the two pillow block bearings for the jackshaft i got for 15$ free shipping for both. the shaft, sprockets and clutch got from AGK. http://motorbicycling.com/showthread.php?t=43037

runnermike · Sep 27, 2013

Thanks for the advice guys!! Think I have made my mind up....guess you guys will have to wait and see...LOL

Dan · Sep 27, 2013

I am taking 7 to one odds she is gonna be a RunnerMike turns ....OK, I got nutton but bet she will be a Home built, designed by you, one of a kind, all your own.... and again, I got nutton. (but still bet non-kit)

Go Mike, Go Mike

runnermike · Sep 28, 2013

@Dan hahahaha lol. Let's just say a coupon will be used in the purchase of something. Wink wink

MadMannArt · Oct 7, 2013

I ordered a 4 stroke kit from gasbike, and a Huffy cruiser from amazon, in a vain attempt to motorvate.. It will be here Wednesday!
HOPEFULLY it will operate long enough to spend even MORE money on Bike #3...
Which I want to be a Qmatic/Honda set up, welded mount, ect, Blah-blah-blah
I have something to do in the shop all winter!
You folks have created a monster...
I bought my first motorized bicycle kit (66/80cc) in Aug this year...

KeithSeymour · Oct 26, 2013

I'm in the same boat teetering between Grubee kit and a 79cc hf. What is the difference in cost piecing together everything needed with the 79cc and the Grubee ($360). This is my first build so I don't have any spare mbp arts laying around.

Tang · Oct 26, 2013

It might cost a little more to piece it together. All depends on how much you do your own building or buying of the parts. You'll spend more then you think if ya buy the kit. The throttle is total junk. I'm putting together my first mob and I wish I bought the pred, but I didn't have this forum when I bought it.
usflg

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