75 only firing on the right cylinders

[Irishman1]

What do you think is going on? The right two jugs are firing but the left side doesn't seem to be firing. I have spark on both sides but it doesn't fire when I spray starter fluid into the left side??? I'm going to pull the carbs tonite anyway because the old filter looked like it was full of coffee grounds

[chewy999]

I'm going to pull the carbs tonite anyway because the old filter looked like it was full of coffee grounds

Sounds like you've answered your own question. Even the filter will let bits through and sounds like your carbs will need cleaning. What does the inside of your tank look like for rust?

[Irishman1]

The tank on this one is awesomely clean. The bowls have the coffe grounds in them too! Cleaning carbs now!

[chewy999]

Sure your not cleaning your coffee maker?

Hope you find the source of your 'coffee grounds'.

[chewy999]

If your tank is clean but your filter isn't, that points to either dirty pick up tubes, fuel line breaking down internally, or contaminated fuel! Is there debris in all the bowls? Just 'speaking' out loud.

[salukispeed]

I may be missing something but you said you have spark on both sides and if you did not get any change with the addition of starting fluid for the left side you likely need to dig deeper. The plugs could be fouled for some reason but swapping left for right would confirm that. Possibly a compression test and then maybe Pop the valve cover off and confirm that all is well. timing belt??

[Irishman1]

Yes, that's thd weird part. I swapped coils thinking it was bad coils even though it was just both plugs on the same side. It still does it with the different coils. Compression is 155 all around. But here's what the carbs look like

[Irishman1]

I should say that last week this bike ran so smooth in small amounts, was just about to take her for a shakedown ride after restoring her up to the carbs, it was running so nice I didn't want to disturb them yet

[Irishman1]

This is the other red 75 in the back here