Motorized Bicycle Engine Kit Forum  


Go Back   Motorized Bicycle Engine Kit Forum > Motorized Bicycle > Motorized Bicycle General Discussion

Motorized Bicycle General Discussion All topics regarding bicycles with engines.

Thread Tools Display Modes
Old 05-29-2014, 01:30 PM
Motorized Bicycle Newbie
Join Date: May 2014
Location: 63028
Posts: 1
Default Re: The Bike Machine

I have one of these little 31cc Mitsubishi built engines on a bike sitting in my bicycle shop showroom. From my prior research, the motor internals were apparently interchangeable with some of Echo's backpack blowers!?!? The history of these units is as follows (by my same prior research): marketed by Kidde (the fire safety folks); orig designed for a fire dept grade smoke blower (hence, friction roller driving on rubber covered wheel of fan's drive spindle); then "re-thought" as a bike engine! This was purportedly due to Mac getting their smoke blowers to market first!

To all of those dealing with K&S "Bike Machine" issues, link for a free PDF download of owner's manual: It will cover all of the needed GENERAL stuff.

Relative to the issue of no spark, I tend to agree with everyone else on eradicating the surface-rust buildup from 30-plus years of humidity on new/unused metal parts. They may also have had a coating of cosmolene, or other protective lube, to negate same. In either case, getting to the spark system to sand &/or degrease is crucial. If you'd find a dead coil/stator/condenser/etc, you can source low-$ solid state conversions from Stens & other small engine pars suppliers; they've been out since before they built this unit! Make sure to source one for the 2-stroke, as 4-stroke units exist, too. I used one on a SKILL chainsaw which had the dumbest exhaust fumes routing method in history: cooling vanes on flywheel sucked the exhaust gas back into the points===D-U-H!?!?!?!? Ten bucks, plus an hour's work, solved it all.. Also had a vintage Puch dirt bike with a totally FUBARed ign system & did same to it.

If it ever DID have fuel in it you'll likely need to pull the carb off & do a full teardown. Salvage all gaskets by carefully removing from mating surfaces with a single edged razor blade. Plan to re-use: gaskets, rubber, plastic components, & float/needle/seat parts. If you don't have access to a heated, ultrasonic vibe-tank (3-stages using white vinegar; followed by a baking-soda rinse; followed by distilled water rinse), instead a thorough soaking/cleaning of the thing in laquer thinner (EXCEPT items I've listed above for re-use). HIGHLY FLAMMABLE!!!!!

BEFORE YOU TEARDOWN THESE UNITS: make sure that any nuts that retain shaft mounted items are NOT reverse (i.e.: left-hand) thread. It seems that the majority of the nut-N-bolt parts' descriptions in the manual are of SAE, & NOT metric, fittings.

As a life-long pro mechanic, AND bicycle shop owner, with a background in product design engineering, I want to broach the following: I have read some postings on other sites about these engines from people who advocate using glues/adhesives/caulks/liquid weld compounds/etc to repair these & other things. These are likely being advocated by the same ilk of folks who think you can buy a REAL bicycle from a store which also sells maxi-pads &/or Barbie-Dolls!?!?!? PLEASE REFRAIN FROM BOTH OF THESE PRACTICES; IT CAN KILL YOU &/or LOVED ONES!!!!!!!!!!!!!!!
Reply With Quote
Old 07-07-2014, 07:17 PM
Ed Maloney Ed Maloney is offline
Motorized Bicycle Newbie
Join Date: Jul 2014
Location: Coloma, MI
Posts: 1
Default Re: The Bike Machine

I have a bike machine I love it. I had it for 25 years still in the box. Installed in twenty min. Started on the first pull.
Reply With Quote
Old 05-31-2015, 08:01 PM
foxxy3285 foxxy3285 is offline
Motorized Bicycle Newbie
Join Date: May 2015
Location: highland park, nj
Posts: 1
Default Re: The Bike Machine


I have a BIKE MACHINE that is brand new and never opened. Would anyone like to purchase it or know anyone that might.

Reply With Quote
Old 06-01-2015, 06:20 AM
curtisfox curtisfox is offline
Motorized Bicycle Elite Member
Join Date: Dec 2008
Location: minesota
Posts: 3,529
Default Re: The Bike Machine

I have one also,and was having trouble with it running right,so took it apart and checking found in really nice shape.

In the prosses of working on it was looking at a pocket bike engine and found that they would bolt right on in place of the Mitsubishi engine.
Reply With Quote
Old 06-25-2015, 07:24 PM
aaon52 aaon52 is offline
Motorized Bicycle Newbie
Join Date: Jun 2015
Location: ca.
Posts: 1
Default Re: The Bike Machine

i know this is an old post but these do turn up from time to time and info is tough to find on them so thought i'd post in-case someone is looking. i bot one a while back was almost as new.. installed it with some light modification as it didn't come with all the attachment hdw. road it over 500 miles with a semislick and in all types of weather in the rain all it needed was to pedal it a bit to get up a little speed befor applying throttle to keep it from slipping.. it developed an issue with staying running a while back and i haven't gotten back to it yet . there is an owners manual that you can find online can't remember where right now and as to a spark issue there is a point set located under the pull start that controls the spark it has a condenser also
Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

All times are GMT -5. The time now is 12:11 AM.


Powered by vBulletin® Version 3.8.9
Copyright ©2000 - 2016, vBulletin Solutions, Inc.