Motorized Bicycle: Engine Kit Forum  

Sponsors



Go Back   Motorized Bicycle: Engine Kit Forum > Bicycle Motor > Motorized Bicycle Trouble Shooting

Motorized Bicycle Trouble Shooting Use this area to post problems that may arise that you could use some help in figuring out what is wrong with their bicycle motor and what needs to be done to achieve top performance.

Reply
 
Thread Tools Display Modes
  #1  
Old 08-18-2008, 08:26 PM
gerichardson's Avatar
gerichardson gerichardson is offline
Motorized Bicycle Newbie
 
Join Date: Jul 2008
Location: Salisbury, MD
Posts: 9
Default Take a look at my spark plug

I'd like some feed back on my spark plug. The plug is a Champion CJ7Y. I need a low profile plug because of the small space above the engine.

I have just over 100 miles on my Chinese 80cc (or whatever) engine. I'm using 20:1 Castrol 2 cycle oil with regular gas now, first two pints was 16:1.

My sprocket is a 48 tooth on a 24 inch wheel. I'm getting about 20mph at around 4800rpm.

The color looks sort of dusty gray tan if you can tell from the pictures.
Does this look okay at this point or running too hot. I have a colder plug, Bosch WSR6F that I could use. Or should I start using a richer gas mixture.

Many thanks to everyone for all your tips.

--George
Attached Thumbnails
Click image for larger version

Name:	cj7y100miles0808b.JPG
Views:	133
Size:	34.5 KB
ID:	2033   Click image for larger version

Name:	cj7y100miles0808c.JPG
Views:	86
Size:	32.2 KB
ID:	2034  
Reply With Quote
Sponsored Links
  #2  
Old 08-18-2008, 08:59 PM
Ghost0's Avatar
Ghost0 Ghost0 is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2008
Location: Bellingham, WA
Posts: 741
Default Re: Take a look at my spark plug

I think it looks pretty good for the high oil content of your premix. After break in you could go to 30:1 and it will probably be a nice tan color.
__________________
Design is easy, execution the hard part.
www.sickbikeparts.com
Reply With Quote
  #3  
Old 08-18-2008, 10:10 PM
misteright1_99's Avatar
misteright1_99 misteright1_99 is offline
Motorized Bicycle Elite Member
 
Join Date: Mar 2008
Location: Treasure Coast, Florida
Posts: 745
Default Re: Take a look at my spark plug

I agree, the insulator looks good for the oil/ fuel mix.....
Reply With Quote
  #4  
Old 08-18-2008, 11:49 PM
thatsdax thatsdax is offline
Motorized Bicycle Elite Member
 
Join Date: Feb 2008
Posts: 827
Default Re: Take a look at my spark plug

That is a great looking plug for now. Once you get past break in, switch to 30:1 AMSoil interceptor and you will be good to go !!
__________________
visit www.thatsdax.com
Reply With Quote
Reply

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 11:59 PM.


Sponsors

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2012, vBulletin Solutions, Inc.
Motorized Bicycle Engine Kit Forum