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.

SY 250 not starting ?

Featured Replies

Had the bike out today, ran it too where we were playing, say 250 yards, set it down to sort out some wee sections, went back, hasn't started since ???

Got home, changed the plug, still not starting :(

Any ideas folks ?

  • Author

Are you getting a spark ?

Is the plug wet?

Have you tried disconnecting the kill switch ?

Getting a spark. :icon_salut:

Disconnected the kill switch, still nothing.

  • Author

Is the plug wet ?

Nope.

The carb was overflowing this morning when I started it up, so gave if a few taps, which seemed to stop the overflow, can this be connected to my issue ?

  • Author

Strip & clean carb time.

Ah bugger :(

Thanks for your help :icon_salut:

Had the same thing on mine a few years back. right at the start of a trial.

I laid it down flat on it's side until fuel leaked out of the carb, I stood it up and it ran more or less ok for the rest of the trial (a bit fluffy), good enough to get a finish.

When I got home I stripped the carb and got some rubbish out, it ran perfectly once I'd cleaned the carb and put it back on.

If the carb was overflowing, you've probably got something stuck in there.

Make sure you run a real thin wire down through the jets to ensure they are clear. Just looking through them isn't good enough as they can look clear, but have a thin scale of varnish that can still plug them up.

I know this sounds like a dumb question but...there is gas in the tank right? You'd be amazed at how many times guys think they have problems and have just run out of gas.

Another dumb suggestion. Make sure you haven't accidentally turned the gas flow off at the pet cock.

After you get it cleaned up and running, put a little SeaFoam or something like that in the tank and start it up till you're sure it's in the carb between rides. The junk they are calling gas these days has so much crap it that it seems to gum up things a lot quicker than it used too. I've had problems with both of my road bikes with the crappy gas they sell. Good luck.

  • Author

Finally got it all stripped and cleaned today after a couple of attempts, fired up nicely after that. :icon_salut:

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.