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Motorized Bicycle General Discussion All topics regarding bicycles with engines, share with others anything motorized bicycle related.


Motorized Bicycle Take a Tip...Leave a Tip

All topics regarding bicycles with engines, share with others anything motorized bicycle related.


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  #1  
Old 01-15-2008, 10:22 AM
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Default Motorized Bicycle Take a Tip...Leave a Tip

You know most of us do things eventually to modify the bikes for the better or worse. It would be a nice gesture if we stick them out there for others to see.

Take this one for what it is worth.

The clutch lever in my kit was trash from the first. I never could make it work worth a darn, so I replaced it with a brake lever I had laying about. Here is the trick. I cut a piece of old inner tube to lock the handle up so I could roll the bike in and out. I leave it on the grip so I can use it to hold the clutch in if I need to adjust the bike.

I also hated the throttle that came with the bike. I replace it with a shifter from a mountain bike. I can lock the throttle in any position while I work on things. I don't think either of those is earth shattering, but they seem to work better for me. Probably won't help anyone else.

So leave me your tip I can use all the help I can get...
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  #2  
Old 01-15-2008, 10:26 AM
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Default re: Motorized Bicycle Take a Tip...Leave a Tip

awesome tip. i did the same thing but kept zip ties to hold in the brake lever that is now a clutch lever. now i take a short screw driver and stick it in thier after i pull in the clutch. i like your idea even better. sounds like you got the same kit as me deacon. replace the plug wire it will make a world of difernece. if you need one let me know and i will send it out. i was riding a half block to get it started after sitting for a few days and with new wire it starts in a few feet
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  #3  
Old 01-15-2008, 12:21 PM
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Default re: Motorized Bicycle Take a Tip...Leave a Tip

I'll keep that in mind if it acts like it is going hinky on me.
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Old 01-15-2008, 01:19 PM
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Default re: Motorized Bicycle Take a Tip...Leave a Tip

My tip: In the formation stage - As received my kit gas tank has "stuff" in it (chunks, rust, dirt). Supposedly the carb and petcock have screens in them (according to eBay kit seller)....but they must be invisible. So on the way home today, I'm buying an inline see through fuel filter at the auto parts store. SHOULD work like a champ.
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  #5  
Old 01-15-2008, 01:24 PM
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Default re: Motorized Bicycle Take a Tip...Leave a Tip

good idea and you can shut off tank at petcock and clean filter witout gas running all over the place
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Old 01-15-2008, 02:22 PM
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Default re: Motorized Bicycle Take a Tip...Leave a Tip

Mine came in pretty good I think, but I wish now I had washed the tank out with gas BEFORE I installed the petcock. Whatever was in there is in there now. I did take it out actually to check the filter. I wanted to make sure that the darn thing was clogged since gas trickles from the tank most of the time.

That seems to be normal for that system. Trickling like a man with an enlarged prostate
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Old 01-15-2008, 02:30 PM
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Default re: Motorized Bicycle Take a Tip...Leave a Tip

Quote:
Originally Posted by deacon View Post
Mine came in pretty good I think, but I wish now I had washed the tank out with gas BEFORE I installed the petcock. Whatever was in there is in there now. I did take it out actually to check the filter. I wanted to make sure that the darn thing was clogged since gas trickles from the tank most of the time.

That seems to be normal for that system. Trickling like a man with an enlarged prostate
So maybe this leads to my tip #2: When I took my tank out of the box, it rattled with all the junk in there. So I've blown it out with compressed air really well while shaking, etc and the rattling stopped. Now I have it sitting with a bunch PB Blaster blown in to halt any oxidation. When it comes time to mount it, I'll rinse with some of last year's premix.
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  #8  
Old 01-15-2008, 02:33 PM
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Default re: Motorized Bicycle Take a Tip...Leave a Tip

sounds like a thorough plan...

Speaking of gas tanks.

I was trying to mount my motor on a schwinn 24" sissy bike. I did in the end but I was playing H*** getting the gas tank to mount. I wanted to use the frame as it was but the tank was too big. I took a look at a couple of smaller plastic tanks from trimmer ect. I even bought two of them. In the end I made a fake bar across the top from a sacraficial broom handle. turned out okay

http://i3.tinypic.com/8227lh2.jpg

One thing I would have liked about the plastic tank, I could have seen the amount of gas left in the tank. Without a gas gauge I have already run out of gas once and I have used the bike only twice. I can tell this is going to be a problem with me.

Last edited by deacon; 01-15-2008 at 02:41 PM.
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Old 01-15-2008, 03:04 PM
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Default take a tip...leave a tip...or a bunch of 'em

These engines were originally made to haul around people for a tiny sip of fuel, low operating costs, and ease of MAINTENANCE....kinda like the old V-Dub beetle. Or the early Honda step through. Or the model T.

Top performance for these engines then should be defined as great fuel mileage, ease of operation and low overall cost.

Some are treating these engines like they should do something other than putt around on a litre of fuel all day and get you where you are going with a minimum of drama.

You aren't going to make one of these engines haul you down the coast @ 40+ MPH or win any stop light drags with that blue haired lady in the Volvo. (although, you may)

You aren't going to find any magic fuel or "performance" add-on that is going to do anything you can't do for pretty much free with the exception being your time. Coleman fuel? nah...super duper spark plug thingy? nah....NOS or turbos? Are you serious? You aren't really serious, are you?

100+ MPG? Yes. Easy running, and easy maintenance? Yes. Lots of tinkering and learning to do maintenence and repairs? Yes, if you want to keep riding it. Fun? Of course, why else would you want to own one?

Buy a good plug, and a good replacement sparkplug wire cap from Pep Boys or other favorite large auto outlet.
Never remove a sparkplug from a hot engine, you may remove the threads from the head as well.
Here's a list of replacement plugs- do it today!

NGK B5HS (preferred)
Champion L86C
Champion CJ7Y low profile or CJ-8
Autolite 4093 or 425


Mix your fuel/oil mixture @ 20:1 for break-in and 36:1 after.

Buy some good gasket paper DON'T MAKE ONE FROM A CEREAL BOx! (really cheap) and make a couple intake gaskets, and install one, even if you think yours is fine. You can make gaskets really easily by drawing the new gasket by using the old gasket as a pattern, and no, it doesn't have to be PERFECT. Use an exacto knife and take your time, finish the rough stuff with some 220 sandpaper. Some of you (me) old-timers will use the "good old ball peen hammer method" to make the gaskets.

Make sure your carb is set right and that means check where the needle clip is, start at the second from the bottom in most cases. One slot lower near sea level. I have two bikes and they are both set up diferently due to poor tolerances in manufacturing FIND THE ONE THAT WORKS FOR YOU- it just depends on your carb and your elevation. (I'm @ 1000' here)

Clean out your tank before you mount it...at least look in there and see if it's full of rust or crud. You can use a shop vac ONLY IF THERE HAS NEVER BEEN ONE DROP OF FUEL...otherwise you'll blow your shop vac to smithereens.

While your in a cleaning mood, pop off the mag side cover and clean all the metal shavings out of there with some spray can brake cleaner and compressed air. Check the area around the sprocket too- full of metal dust!

To save yourself a lot of hassle, buy a length of M6X1.00 pitch threaded rod and REPLACE ALL THE STUDS. Or make them outta bolts like I did. Those would be the intake, exhaust and also the four mounting studs. The originals are made of "anti-metal" and will strip at the first inopportune moment.

Secure all wires with zip ties or electricians tape so none are pulling at the ends or connections. Seal up any ends/connections that are in doubt with liquid electricians tape...READ THE DIRECTIONS ON THE CAN!

Grease your gears with some wheel bearing grease or lithium grease before you ever fire the engine up, then again after about 50 miles. USE ONLY A TINY AMOUNT OR YOU'LL BE CLEANING THE CLUTCH SOON. (a dab about the size of a pencil eraser is PLENTY. Clean them first with some brake cleaner, or carb cleaner, then lube.
Don't spray brake or carb cleaner in your eyes, you won't be doing anything else on the bike for awhile afterwards, if ever.

While you are greasing stuff remove, clean and grease all your wheel bearings, or YOU WILL BE SORRY. Bicycles are not really made to haul a 200+ pound guy over the road and all the bumps/potholes/ect @ 25-35 mph. The bearings take a massive beating. Use red grease because it starts to turn black when it needs servicing.

Make sure your chain is aligned and lubed. Same goes for the pulley/tensioner. Don't make the chain TOO TIGHT. 3/4-1" play.
Always clip on your masterlink so the opened end faces toward the rear when it's at the top of the chain run and going forward.

Zip tie your spokes where they cross while you are installing your sprocket.

Balance your wheels- I used solder wrapped around the spokes at the rim. You can buy stick on weights at the sporting goods store...in the golf aisle.

Don't try to use your clutch to take off.

Use loctite on every bolt you put a wrench on, and don't OVERTIGHTEN the head bolts, or any bolt that goes into aluminum. 15-20 ft/lbs. is enough, and that goes for the spark plug too! While we're on the subject, you do use anti-seize compound on the plug threads, don't you? Never remove a sparkplug from a hot engine, you may remove the threads from the head as well.

Make sure your brakes are up to par. Stuff hurts more @ 35MPH than it does @ 10MPH, especially if it stops you before your brakes do.

Ride defensively, because the only drivers that will see you are the ones you DON'T want to see you- aka "da fuzz".

If you have a problem with dogs chasing you- eventually they get old and bored and leave you alone...if they are smart.

Last edited by Bikeguy Joe; 02-14-2008 at 05:50 PM.
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  #10  
Old 01-15-2008, 03:23 PM
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Default re: Motorized Bicycle Take a Tip...Leave a Tip

Sounds like a lot of good advice. I'll have to cut and paste it. Since there is no way this old brain can absorb so much information at one time.
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