I think so I will try again anywayHave you tried running it without those filters on after it starts running problems?...
I bought the Cresta from a mechanical idiot who had a friend who was also a mechanical idiot but willing to have a go. I didn't know it at the time but these two had replaced the big ends and had put the wrong size shells in. It was a 6 cylinder, No 1 big end seized and scored the crank. I replaced the remaining 5 big ends, removed No1 piston and con rod and carried on driving it. On tick over it shook like someone with Parkinsons on roller skates.Hello mate yes as a new complete rebuild
Tight big ends? What was that oil starvation and over heating?
the piston should have some resistance when you lift it up, and snap down quickly when you let it go. when the engine is off, you should be able to lift to the point you can't see it and it should be a nice smooth action.
if on idle, one piston is holding higher than another, then your carbs are not balanced. if its that noticeable then you need to sort it before proceeding any further. the left hand carb is obviously way too lean, while the right hand is not far off
I think you're getting closer to the resolution
does it move freely and quickly with the plunger removed? the plunger itself might need a cleanWell they did get recleaned and checked a few weeks back I will do another clean no crap in it last time but chamber still slow on dropping down? What oil do people use in the dash pots?
Hi yes it does move quickly with the plunger removed. The right hand carb makes a little clunk noise when it re seats the left is slower and doesn’t.does it move freely and quickly with the plunger removed? the plunger itself might need a clean
you're supposed to use a special oil I believe, but I have always used regular 20/50 engine oil and never had any issue
I’m going to see if I can track down a SU carb man
whats that tool set for? looks exciting!Why?
Seems @kermit_rr is pretty clued up in being able to explain. ( something I sometimes struggle with)
Have you had a gooogle as loads on setting up SUs mg forums is a good source.
I got these
View attachment 181854 View attachment 181855
If I ever come across another with SUs.
But the Crypton is handy for setting up the Zed.
Even badly set if the run, they run. Still for some reason doesn’t (for me)explain the cutting out totally.
Do you have a gravity feed container you could rig up to supply fuel for testing purpose.
J
whats that tool set for? looks exciting!
to get the balancing in the ballpark, a feeler gauge is a good start
i made my own vacuum gauge to set more accurately. works well on my bike and cost about £5
Hi yes it does move quickly with the plunger removed. The right hand carb makes a little clunk noise when it re seats the left is slower and doesn’t.
I’m going to see if I can track down a SU carb man