MOT question

I am having a slight problem with the Bantam Sport D14S.
The exhaust turns down out of the cylinder then up, leaving a nice
sump into which unburnt fuel/oil/crap settles, blocking the pipe
and making it a pig to start if the fuel tap gets left on.

I want to drill a hole at the lowest point to let it drain, will
this cause an MOT failure ?.

 

I can't see how leaving the petrol tap open can drain into your exhaust
pipe - crankcase, yes.

It will certainly cause problems if you do drill a hole and leave it
open, but I don't know if that would make it fail the MOT.

You may get backfiring on the over-run, and perhaps (depending on its
exact position) a serious loss of power - BUT, no reason why you
shouldn't drill the hole and screw in a short (or shortened)
self-tapping bolt, cushioned by a heat-resisting washer.

Of course, it would be better to braze (or have someone braze) a nut
over the hole, which would allow you to drain it and screw it up tightly
afterwards.

 

How can fuel get from the carb into the exhaust pipe. FFS?

Yes.

 

In communiqué <1iqibjk.1xidjpb1ily6tzN%>,

Sounds like normal stroker dribble to me. Needs a dealer's decoke
occasionally.

The pig is more likely of the fuel accumulated in the crankcase variety
- "gassed up".
What sir needs is a crankcase drain plug.

--
+----------------------------------------------------------------+
| Pete Fisher at Home: |
| Voxan Roadster Gilera Nordwest * 2 Yamaha WR250Z |
| Gilera GFR * 2 Moto Morini 2C/375 Morini 350 "Forgotten Error" |
+----------------------------------------------------------------+

 

Thats what had me wondering, but the damn thing was full. There was
also a load in the crankcase. Maybe it depends on where the piston
happens to have stopped, or maybe the repeated kicking moved it
from the crankcase.

I think I'll just put it back together and see if it happens again.

 

*ding*
--
+----------------------------------------------------------------+
| Pete Fisher at Home: |
| Voxan Roadster Gilera Nordwest * 2 Yamaha WR250Z |
| Gilera GFR * 2 Moto Morini 2C/375 Morini 350 "Forgotten Error" |
+----------------------------------------------------------------+