James Byrne

Hey everybody, first time poster. Need some assistance from the hive.

So one of my job requirements is to tear through desert on my team's 49cc Ruckus (Has a K&N filter and offroad tires). My team's Ruckus has 399 miles on it and gets abused regularly. We jump it from time to time, ride through all types of dust and sand, and has been dropped quite a few times.

I should note that before the mods started it ran perfectly fine with zero issues. We wanted to make our Ruckus faster because it is slow as crap, so we took off as much weight as we could. Lights, fenders, etc. Then we took the exhaust off because it weighed like 8lbs with the intention of fabricating a little straight pipe for it. Fast forward about a month or two of occasional use and we starting having an issue with the bike bogging down on acceleration. So we figured we would put the exhaust back on thinking it was air/fuel ratio problem.

That same time our Stage 1 kit from TRS came in, so we wired up the CDI box thing and took it for a short test ride before installing the Polini variator. It ran strong for a couple minutes...

Here is where the problem happened.

The idle bogged down (still running) and at the slightest application of throttle, it shuts off. At the time we thought it was out of gas (the gas light came on) so we figured we would get some gas the next day and all would be well. So today we got to work, filled the gas tank, installed the Polini variator kit, reinstalled the exhaust, and.... same bogging down problem.

We opened up the plastics to recheck the wiring on the CDI kit. We found 1 broken wire that connected to the crimped connector on the ignition wire. We fixed that, and still, same bogging down problem. It will start up and idle, the idle can be adjusted, but as soon as throttle is applied, it dies.

We removed the spark plug to inspect, and discovered the spark plug was covered in oil...

At that point we had to stop fooling around and get back to work... so... yeah. Any helpful words from you experts will be greatly appreciated.. sorry for the novel, but I figured the background was pertinent. Thanks everybody.

James Byrne

sTol2m

Which K&N air filter kit are you using, the drop in replacement or the 3 piece kit?
The Stage 1 kit is not the problem(good choice by the way), but runnig the bike without the exhaust(not a good thing)
in offroad conditions probably dirtied up the carb and the jets. I would suggest you clean out the carb & jets first.

James Byrne

Just the drop-in filter, nothing fancy.

And yeah we didn't originally intend to run it sans muffler, so we will start there