New mini bike project

[dlmeyer0325]

I have been looking for another project, and I found this little guy at an auction. I started bidding and another guy seemed very determined to get it. It quickly went up to $70 and I said way to much. My neighbor later helped the guy load it up, and told him that I was really wanting it. The guy said that he didn't even want the #@$% thing, he thought he was bidding on a field sprayer next to it. My neighbor snatched it up and brought it home for me. (I have to put in a little shtick in about how I love having good neighbors!) Anyways here are some pics. I got a little carried away and began taking parts off of it before taking pics. I took the head off of it and the cylinder looks brand new. The chain was rusted solid and was the only thing from keeping it turning over. Good compression. You can see where some one had a 1/2 inch galvanized pipe for an exhaust. After a little cleaning, I going to throw it back together to see if itll fire up. Ill post more pics as it progresses. Also a after looking around, I think this thing is a Alexander mini bike with a 3hp tecumseh engine.




Update:
Finally got spark. The points were corroded and it wasn't ground properly. I used an omh meter and everything checked right, also I knew I was on the right track when I shocked myself. Degreased the engine and cleaned the carb. Here are new pics

[dustrunner]

looks like a fun project = where were the antlers mounted ?

[mooseknuckle]

Thats awesome! Have fun with the new project. I'm hoping to pick up a mini bike in the next year or two to fix up for my son. He's only two and a half so I've got some time. Keep the pics coming as you progress.

[dlmeyer0325]

I just realized today that the motor on my troybilt tiller that blew up last year is almost exactly the same. Going to scavange parts. I'm running into a problem with removing the fly wheel. any recomendations? I don't have a fly wheel puller.

I went to get pull rope and a twist throttle today. the guy had a crotch rocket mini bike in parts. I'm debating whether to take the rims and tires off of it so I could have disc brakes instead of a masher?

[dlmeyer0325]

123456q- sheds i found last year...just happen to be layin there. maybe hood ornament for the new bike?

[barnett468]

Hello

Very archaic, I love it. I saw your photo on mini bikes" also. This guy just sold a possibly newer model show bike for only $300..00. Man I would have bought that. He may know something about yours though and might have parts you need!

http://www.ebay.com/itm/Vintage-Alex...p2047675.l2557


Some guy here named tom browning collects them he may have info and parts.

http://jleibovitch.tripod.com/id190.htm

[dlmeyer0325]

Well got the pistons cleaned and new carb on. Now I can't get any spark. I've cleaned that magneto and fly wheel. There is a ground wire that attatches to the magneto...is that normal? also when I took it off there was another wire with a stripped end and female end. not sure if it was made for a kill switch but I cant figure out where it hooked on. Any ideas why I can't get a spark? Here are some pics

[barnett468]

Hello

This is all I have for now either contact the guy I mentioned above or one of the many mini bike forums on the net or just take it to a lawnmower repair shop and they can immediately tell you what goes where and how to check it. The condenser may be bad try it without first.

[dlmeyer0325]

thanks for the contact. I'm already oldminibikes.com but apparently this engine is not common. it the 2.5 hp version. can't find much technical data. ill try to contact tom.

[MonroeMike]

What is the model/serial number of the engine?

[barnett468]

Hello

Looks like monroemike may have something up his sleeve. I can tell you this for sure all old school mags work the same so any crusty old lawnmower repair guy can help you, the young ones probably not. It's been so many eons since I have dealt with ine i'd only be guessing other than unhooking the condenser.

[dlmeyer0325]

engine h25-25196h serial# 1215B I have found the parts diagram but no manual. Barnett468 I have a crusty old lawnmower repair guy close, I'll have to try him. Also I can't find Tom Browning on the boards.

[barnett468]

OK Here’s the deal I finally woke up [hopefully]. I do not know your level of electronic experience so bear with me.

Do you know how to use an ohm meter?

Do you know how to check continuity on the points with one?

Have you checked the condition of the contacts on the points?


TEST

Inspect the contacts on the points, they are located under the metal plate that is held down by the metal clip. How do they look? Do not clean them yet.

Check the continuity from the movable arm on the points to the base or from the back side of one contact to another, is there continuity? If not this is good go to next step but if there is then file and clean points with brake cleaner, reassemble and set gap at .018-.020 and see if you have spark, if there is no spark now remove condenser reassemble try again, if you have spark now you need a condenser if you do not have spark now you need a coil that’s it.

Next step if no continuity between points – File or sand points flat, clean with non water based brake cleaner, wipe with paper towel to remove film.

Check continuity, if yes then go to installation test above, if no go to next step.

Remove condenser wire there must be continuity now if not your points are bad.

Get new points and reinstall condenser and do installation test above.

That's it your done hopefully

[MonroeMike]

Here's some info.

http://www.sendspace.com/file/1ovt0x

Don't get fooled by the ads.

Use "Click here to start download from sendspace".

[kb0nly]

I agree with whats been posted already, i had to work on some old Tec motors like that, need to dig into the points. The points and condenser can both be replaced with common parts from other models. The last one i had to work on i bought a complete kit off ebay with the points and condenser.