CaptainRon
07-22-2014, 11:22 AM
Tried to jet my '85 Big Red for a higher altitude, and was unable to find smaller jets in time for my trip.
So screwed pilot screw in to get highest idle, and lowered needle.
Unsure where to get correct jet (selection), was hoping to find my stash of ATC185 carbs in hope of smaller main and pilot jets, but still looking.
Drilled (cut out) 5 holes in a spare Big Red airbox lid - made a slight but noticeable difference in low-end power, so much so that I needed to readjust the mixture screw a little because of change in air flow.
But dirt/dust gets to the filter MUCH easier, by the way.
Also installed a MUCH brighter headlight I got from Oreilly Auto (Advance Auto has 'em too).
Bulb is for a two-headlight car, and is the Sylvania Silverstar Ultra bulb.
To ride in extremely rocky conditions I had to air down to slightly over one pound pressure, so suspension not as overtaxed.
I had just installed new tires, with more plys than stock, which likely also makes a difference.
Removed and disassembled carb to clean it before trip - after reinstalling I noticed that the throttle lever bottomed out on handlebar stop before carb opened all the way - readjusted cabling so throttle slide in carb audibly stops before throttle lever does (on handlebar).
Might be something to watch for/check out.....
Installed new Moose air filter for the Big Red from DennisKirk.com, seems to flow slightly better and was inexpensive.
So screwed pilot screw in to get highest idle, and lowered needle.
Unsure where to get correct jet (selection), was hoping to find my stash of ATC185 carbs in hope of smaller main and pilot jets, but still looking.
Drilled (cut out) 5 holes in a spare Big Red airbox lid - made a slight but noticeable difference in low-end power, so much so that I needed to readjust the mixture screw a little because of change in air flow.
But dirt/dust gets to the filter MUCH easier, by the way.
Also installed a MUCH brighter headlight I got from Oreilly Auto (Advance Auto has 'em too).
Bulb is for a two-headlight car, and is the Sylvania Silverstar Ultra bulb.
To ride in extremely rocky conditions I had to air down to slightly over one pound pressure, so suspension not as overtaxed.
I had just installed new tires, with more plys than stock, which likely also makes a difference.
Removed and disassembled carb to clean it before trip - after reinstalling I noticed that the throttle lever bottomed out on handlebar stop before carb opened all the way - readjusted cabling so throttle slide in carb audibly stops before throttle lever does (on handlebar).
Might be something to watch for/check out.....
Installed new Moose air filter for the Big Red from DennisKirk.com, seems to flow slightly better and was inexpensive.