Scooterotica

handy with the grinder!!!

Just little update on my RB250.

I'd had issues with carb settings and just could not get it right, so stripped it down to find reed petal had brocken on far side and crack in casing by cylinder stud and transfer area on lower part of casing.

Unfortunately the new engine casing supplied had been machined the full depth to accept spigot and not part of the depth as described in fitting instructions which does leave it weak in that area.

Its been welded up and back together allthough the confidence in the indian casing is not great as i have known these to fail in the past.

Lambretta Sash wrote:Just little update on my RB250.

I'd had issues with carb settings and just could not get it right, so stripped it down to find reed petal had brocken on far side and crack in casing by cylinder stud and transfer area on lower part of casing.

Unfortunately the new engine casing supplied had been machined the full depth to accept spigot and not part of the depth as described in fitting instructions which does leave it weak in that area.

Its been welded up and back together allthough the confidence in the indian casing is not great as i have known these to fail in the past.

I've heard about possible casing problems so I'm getting the 125 casing beefed up in those areas when it gets converted by CS Engineering. I think is great to be increasing a casing from 125 - 250

I have seen the whole bottom part crack and come away with the cylinder and head attached as one in he past!

If it fails again that will be the route i'll take.

CS Engineering would be the place i would get a casing done too, I get them to do my engineering work as they deal with scooters on a regular basis.

Oopening up from 125 -250! By CS engineering, great job!!

Lamaddict wrote:Oopening up from 125 -250! By CS engineering, great job!!

was this a spanish 150 case? how much to convert?

No Innocenti S3 one, I just let CS know it was for 250 and he's done it to suit. I'll match up the ports but that's easy.

Lamaddict wrote:No Innocenti S3 one, I just let CS know it was for 250 and he's done it to suit. I'll match up the ports but that's easy.

costallotti!

joespeed wrote:

Lamaddict wrote:No Innocenti S3 one, I just let CS know it was for 250 and he's done it to suit. I'll match up the ports but that's easy.

costallotti!

Hope not but I'll let you know the cost. From this thread and other people saying just opening up a SIL casing may not be enough.

jonashford wrote:handy with the grinder!!!

Cheers, you find that works ok, might give it a go with an old cowling.