Motorized Bicycle Engine Kit Forum  

Sponsors



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

Motorized Bicycle General Discussion All topics regarding bicycles with engines.

Reply
 
Thread Tools Display Modes
  #8371  
Old 06-19-2015, 08:00 PM
knightscape's Avatar
knightscape knightscape is offline
Motorized Bicycle Elite Member
 
Join Date: Jul 2013
Location: Maine
Posts: 339
Default Re: what did you do to your motorized bicycle today?

Took a sanity ride after work today. Bout 12 miles to my folks' and back. Gorgeous summer evening here in Maine. Just what the doctor ordered after a nutball week. First long ride since jetting and intake mods. Defintely added mid range power. I think I'll try up another size on the jet and see what happens.

Reply With Quote
  #8372  
Old 06-19-2015, 09:13 PM
Davezilla's Avatar
Davezilla Davezilla is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2014
Location: San Antonio Texas
Posts: 2,710
Default Re: what did you do to your motorized bicycle today?

that's a really nice looking bike you got there...
All I've done today so far was air up the tires on the road bike and flip the rear wheel around so it runs off the freewheel side, but I'm still at the shop so I'm getting ready to put a rear sprocket on the fixie side of the hub and hopefully get an engine together and installed before I run out of steam for the night...
Reply With Quote
  #8373  
Old 06-20-2015, 12:11 AM
scotto-'s Avatar
scotto- scotto- is offline
Custom 4-Stroke Bike Builder
 
Join Date: Jun 2010
Location: Ridin' inSane Diego, CA.
Posts: 6,508
Smile Re: what did you do to your motorized bicycle today?

Nothing....just plain old nothing. Nothing needed doing as usual. Plug-n-play is the way I like to roll
__________________
==================================================
EZ Motorbike Dealer - San Diego, CA.
http://www.ezmotorbike.com/
Nothing is out of my realm,
if it doesn't fit, make it fit! Beer is the answer....what was the question?
A sense of humor costs nothing, why don't people use them more often?
"You can't buy respect.....you have to earn it"
==================================================
Reply With Quote
  #8374  
Old 06-20-2015, 12:20 AM
Legwon Legwon is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2013
Location: Van bc Canada
Posts: 248
Default Re: what did you do to your motorized bicycle today?

tightened up some bolts, installed a new muffler
will have to be modding it though... not what i was expecting :s
Reply With Quote
  #8375  
Old 06-20-2015, 12:33 AM
xseler's Avatar
xseler xseler is offline
Motorized Bicycle Elite Member
 
Join Date: Apr 2013
Location: OKC, OK
Posts: 2,432
Default Re: what did you do to your motorized bicycle today?

Quote:
Originally Posted by knightscape View Post
Xseler, can you tell me about the direction your head is facing? I thought slant heads were supposed to have the plug facing forward for some reason? I don't know it if matters and I realized I don't have any idea why I thought that. Does it not actually make any difference?

I've ran it both ways. However, I've got a theory --- the bike runs slightly faster this way because of less air resistance.



__________________
You're never lost until you run outa gas.
Reply With Quote
  #8376  
Old 06-20-2015, 02:00 AM
Panhead's Avatar
Panhead Panhead is offline
Motorized Bicycle Senior Member
 
Join Date: Mar 2015
Location: Michigan U.S.A.
Posts: 74
Default Re: what did you do to your motorized bicycle today?

Quote:
Originally Posted by knightscape View Post
Took a sanity ride after work today. Bout 12 miles to my folks' and back. Gorgeous summer evening here in Maine. Just what the doctor ordered after a nutball week. First long ride since jetting and intake mods. Defintely added mid range power. I think I'll try up another size on the jet and see what happens.

The John Deere paint scheme is cool. I think I need to hike my jet size, too. Thank goodness I ordered a carb that came with an entire box of different sized jets! Kind of like playing Jeopardy, one day I'll hear >ding< and Alex Trebeck will smile and say, "Panhead, you're today's winner!"
Reply With Quote
  #8377  
Old 06-20-2015, 04:07 AM
Davezilla's Avatar
Davezilla Davezilla is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2014
Location: San Antonio Texas
Posts: 2,710
Default Re: what did you do to your motorized bicycle today?

Tonight I actually made some decent progress with the road bike project... first I had to decide how I was going to install the rear sprocket so I decided to open up the center hole just enough to fit the flange of the fixie cog in thru the hole then made sure everything was centered up, clamped the 2 together then welded the 44 tooth sprocket onto the fixie cog. Problem solved, no rag joint, no adapters, perfect chain alignment, no complaints here...

I was just going to do that and go home but decided to choose an engine for the bike, temp installed the super rat then decided to go with a Dax engine instead. Grabbed a brand new Dax bottom end from the stock room, got a cylinder I previously ported, did a quick hone job to get the right cross hatch pattern, and put a piston on with the rings removed, trial fit the cylinder and the piston was protruding by about 1.5mm... I definitely didn't want to stack head gaskets so I grabbed the degree wheel and some copper base gaskets as well as a .040" thick spacer.
Stacked the gaskets and spacers until I got a 0.6mm squish clearance using a .025" thick copper head gasket, then checked the port timing to see if I needed to cut any more on the jug or not. After setting up the degree wheel I ended up with 164 degrees of exhaust duration, 122 degrees of intake and 132 degrees on the transfers so no piston ramping or cutting of the skirt will be needed or done.
I still need to take the top end back off to put the rings on the piston and then do a final assembly. The pipe of choice for this one will be a kx65 pipe since it fits really well with minimal modification and should hit where I want it to for a good combination of acceleration and top speed. For the carb I'm leaning more toward the mikuni vm18 for this engine since it's still fairly easy to tune and I want this bike to be not only fast but able to get up to speed quickly as well.
here's a pic of the progress I've got so far... this frame makes it a lot easier to work the engine without having to take it out of the frame so I've been able to set up the port timing and squish clearance, the head is temp installed so I could see what it's going to look like and to protect the internals until I can finish everything else I'm doing to it...

Reply With Quote
  #8378  
Old 06-22-2015, 03:28 PM
Tony01's Avatar
Tony01 Tony01 is offline
Motorized Bicycle Elite Member
 
Join Date: Nov 2012
Location: San Jose, CA
Posts: 647
Default Re: what did you do to your motorized bicycle today?

It's running good! Like scotto said plug n play... Changing the oil..

Davezilla that should be a screamer... Watch out for those road bumps
Reply With Quote
  #8379  
Old 06-22-2015, 10:11 PM
Davezilla's Avatar
Davezilla Davezilla is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2014
Location: San Antonio Texas
Posts: 2,710
Default Re: what did you do to your motorized bicycle today?

Yup... this one's gonna scream but after a short ride in the parking lot I'm already looking at a shock absorbing seat post, cloud 9 seat, and shock absorbing stem for it... this one does ride just a bit rougher than my other bikes but luckily I got lots of smooth pavement to ride on
Reply With Quote
  #8380  
Old 06-22-2015, 10:30 PM
DRBS's Avatar
DRBS DRBS is offline
Motorized Bicycle Elite Member
 
Join Date: Jun 2014
Location: Westland MI U.S.A
Posts: 265
Default Re: what did you do to your motorized bicycle today?

i took my cylinder off today and added the third transfer port boy did that add some more power!!!!! now i can really notice the reed valve working no more burb burb out of the carb my air cleaner is dry and it feels better at mid to high range cant wait to build my own expansion chamber next weed getting some .035" sheet metal and going to use my pressure washer to expand it out should be pretty good for a home built expansion chamber ill post pics of the finished exhaust when im done with it
__________________
hang on a second I think ill use my nox now
Reply With Quote
Reply

Tags
clutch, motorized bicycle, oil, tensioner

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 03:10 AM.


Sponsors

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