Thursday, April 15, 2010

Derbis are weird.

First off, in my last post I mentioned that my piston and cylinder were pristine. Here are some photos:
As you can see, there is a little but of scoring but really it's not too bad. The rings look good and based on the performance right before the seizure(?) it seems like it's all good.

In other news, I got some new treats! First off, I'm a big fan of quality controls. Like these! These new controls are really cool. Long pull throttle, moped length tube, nice S shaped levers, and neat little levers for choke and decomp.

I also got some new reed material for my polini reed setup. Green reeds, .35mm of thickness will take me to the promise land of speed!

So I began digging elbow deep into the derbi, and I discovered some things:
Derbi swingarms are really solid.
Also, Derbi was REALLY into branding everything they manufactured.

Pop quiz: In front of you is four pullers. What do they have in common?
Answer: None of them fit into this flywheel. Looks like I'm in the market for a three jaw puller. Or at least in the market for borrowing one.
When I pulled the cylinder and head off the Derbi I discovered this HUGE spacer/ gasket. Based on the thickness of a cylinder ring I'd guess this thing is 3mm thick. I don't understand at all. Is this necessary so the piston won't hit the head? Wouldn't this raise the timing? or is the cylinder decked so the spacer is necessary for timing? I don't know.
And lastly is the pipe that Naz and I cut and rewelded. Naz did such a good job rewelding the header after we cut it that it looks like it's always been that way.

Anyhow, that's whats up in my shop. I hear that there is some scooter rally going on in Kentucky this weekend. Wish I could be there but them's the breaks.

1 comment:

  1. I am trying to figure out how to email you so I will just post here. I have a question about a Derbi Variant that I think you may be able to answer if you could email me I would appreciate it.