Skip to content
View in the app

A better way to browse. Learn more.

Trials Central

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

Jetting A Keihin Pwk For 3,000 To 6,000 Ft Altitude For Rev 3 270

Featured Replies

As per the title, I'm grappling with carb setup and wonder if anyone has recommendations? I am generally riding the bike between 1,000m and 2,500m altitude (3000ft to 6,000ft). Bike currently has the UK standard of 48 pilot jet and 110 main. I'm not sure what needle it has or what clip setting it is on, but next time I am in there, I'll take a look.

Appreciate any thoughts and suggestions.

  • Author
:hyper: - The bike is doing a degree of mountaineering, that's for sure! That snow is tricky stuff to ride on though.

Well....been through a lot of snowmobile setup for those kind of altitudes, it is all about barometric pressure on the surface of the fuel and loss of signal strength at lower engine speeds

Main drops about 3 sizes

Pilot may or may not change, reduced atmo pressure means less fuel flows through the pilot so it corrects itself to a certain extent, it may drop a size or it may even run lean and need to be up sized

Needle will probably drop one clip

But you need to be careful at low alt's after you make adjustments, particularly at partial throttle you can squeak it on the needle

Opening the air box up helps a lot at altitude but you can't really do that on a Rev

i live at 5400FT, and ride at 9,000 and over. if i remember right, i left the pilot alone, and used a 105 main, stock needle in the middle notch. and adusted if needed.

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

Account

Navigation

Search

Search

Configure browser push notifications

Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.