Penton Owners Group
Penton Owners Group
Home | Profile | Register | Active Topics | Members | Search | FAQ
Username:
Password:
Save Password
Forgot your Password?

 All Forums
 General Discussion
 Penton Talk
 carb for jackpiner
 New Topic  Reply to Topic
 Printer Friendly
Author Previous Topic Topic Next Topic  

jbushey
Average Member

USA
25 Posts

Posted - 09/04/2017 :  5:56:24 PM  Show Profile  Reply with Quote
I just got running a Jackpiner that I picked up from Victor ,it doesn't seem to run as strong as I thought that it would.Does anyone know the correct carb for a '73 ,my book calls for a 54/36/xxx bing, it has a 84/30 xxx on it. thanks for any help.

JEFF BUSHEY

Larry Perkins
Advanced Member

USA
2111 Posts

Posted - 09/04/2017 :  5:58:43 PM  Show Profile  Reply with Quote
I don't think the 175 ever used a 36. I think a 30mm then later a 32mm. The 250 used a 36mm.

Larry P
Go to Top of Page

jbushey
Average Member

USA
25 Posts

Posted - 09/05/2017 :  12:42:52 AM  Show Profile  Reply with Quote
thanks larry I do have an 32mm also does anyone have the jetting for a 32mm at about 4000ft elev. thanks

JEFF BUSHEY
Go to Top of Page

Bob Gilman
Advanced Member

89 Posts

Posted - 09/05/2017 :  3:28:39 PM  Show Profile  Reply with Quote
Jeff,the dealer service info up dated mar.1,1974 for the 175
carb bing#2/30/101
main jet #150 to#155
pilot jet #35
needle jet #280
needle pos.#2 middle
reccomended replacing the float needle to part#40-405 for better carburetion,idling,and gas mileage.
these spec's are for using the twin air oiled air filter most everybody uses today
Go to Top of Page

Dale Fisher
Advanced Member

USA
1533 Posts

Posted - 09/05/2017 :  4:15:59 PM  Show Profile  Reply with Quote
I might note that there are many articles on carburetion and other issues in the Keeping Track archives

http://www.pentonusa.org/publications/default.asp

Dale Fisher
Penton Owners Group - President/Memberships
POG Merchandise
Mudlark Registry
Facebook - Penton Owners Group - Administrator
Facebook - Cheney Racing Group - Administrator

Edited by - Dale Fisher on 09/05/2017 4:16:51 PM
Go to Top of Page

Mickey Sergeant
Advanced Member

USA
280 Posts

Posted - 09/05/2017 :  10:10:26 PM  Show Profile  Reply with Quote
Hi Jeff got the bugs worked out on my jackpiner. Running a 30mm mikuni with a reed valve.See ya at your race at Bushy ranch. Hope all the fires stay away.
Go to Top of Page

firstturn
Advanced Member

4193 Posts

Posted - 09/06/2017 :  09:23:21 AM  Show Profile  Reply with Quote
Jeff you might start with what jets you have now and go to information provided by Bob Gilman. Your bike may have been jetted for sea level and at 4000 feet above sea level makes it not run well. The reason I say this is that you should note what you have now to use in the future. Have you cleaned the carburetor?

Ron Carbaugh
Go to Top of Page

Steve Minor
Advanced Member

USA
1210 Posts

Posted - 09/06/2017 :  10:06:40 AM  Show Profile  Reply with Quote
If I might add something to what Ron said, only make one change at a time...make a change and test. If it's the same, change it back and change something else and keep good notes.

Steve Minor
Go to Top of Page

jbushey
Average Member

USA
25 Posts

Posted - 09/07/2017 :  11:42:42 PM  Show Profile  Reply with Quote
thanks every one for all the info i never knew of the Penton tech tips thank you Dale lots of useful info .Mickey looking forward to the race in Canby Hope we get some rain before then so we can run the longer CC course. thanks again

JEFF BUSHEY
Go to Top of Page

jbushey
Average Member

USA
25 Posts

Posted - 09/07/2017 :  11:57:14 PM  Show Profile  Reply with Quote

thanks for the help

Edited by - jbushey on 09/10/2017 1:23:25 PM
Go to Top of Page
  Previous Topic Topic Next Topic  
 New Topic  Reply to Topic
 Printer Friendly
Jump To:
Penton Owners Group © 2001-2015 Penton Owners Group. All Rights Reserved Go To Top Of Page
Powered By: Snitz Forums 2000 Version 3.4.06