RZ250 won't pull under load.
Posted: Tue Jun 13, 2017 6:01 pm
Here's one of those silly ones. Been there before, but this one is annoying me.
'83 RZ250. Very original unbodged bike. 1st oversize, all that done recently. new PV stuff, carb cleanout and float valves etc, all the obvious things checked. (mind you I've found mismatched plugs).
The thing just won't pull low down and under load. It's like a vicious powerband, Feels like it's going to die, then once it gets up a bit it pulls like a teenager, but it just totally bogs down at low rpm if there's any load on it.
PV adjustment / travel looks good. I've by-passed the fuel tap vacuum system -running on PRI, this has made no difference, air cleaner all good. Plugs look very oily but the thing hasn't had a chance to get hot and clean itself out.
I know it's going to be something simple and I should have picked it, but any ideas? Yes, been freshly rebored, rings, run in. It's not something that has happened because of work done on it. This symptom has just occurred out of the blue, it had been running fine.
'83 RZ250. Very original unbodged bike. 1st oversize, all that done recently. new PV stuff, carb cleanout and float valves etc, all the obvious things checked. (mind you I've found mismatched plugs).
The thing just won't pull low down and under load. It's like a vicious powerband, Feels like it's going to die, then once it gets up a bit it pulls like a teenager, but it just totally bogs down at low rpm if there's any load on it.
PV adjustment / travel looks good. I've by-passed the fuel tap vacuum system -running on PRI, this has made no difference, air cleaner all good. Plugs look very oily but the thing hasn't had a chance to get hot and clean itself out.
I know it's going to be something simple and I should have picked it, but any ideas? Yes, been freshly rebored, rings, run in. It's not something that has happened because of work done on it. This symptom has just occurred out of the blue, it had been running fine.