Hard to cold start

[Sb_750]

Hello I have a bmw r75
I have velocity stacks and a mesh filter and the bike runs perfectly but there is a small issue where it does not start without starter fluid when cold. Once started though it runs perfectly. Hot starts also are easy. Please help thanks

[barryh]

Are the enrichers working ? One possible problem is a blocked jet in the float bowl. Remove the float bowls and you will see the enricher wells into which a long brass tube inserts from the main carb body. At the bottom of the well is a small hole or jet that allows the well to be filled from the float bowl. Make sure that hole is clear which should enable the enrichers to function.

[Kurt in S.A.]

How did it run before the velocity stacks?

Kurt

[Sb_750]

Are the enrichers working ? One possible problem is a blocked jet in the float bowl. Remove the float bowls and you will see the enricher wells into which a long brass tube inserts from the main carb body. At the bottom of the well is a small hole or jet that allows the well to be filled from the float bowl. Make sure that hole is clear which should enable the enrichers to function.

I will check that now

[Sb_750]

How did it run before the velocity stacks?
I think it was working fine but it was sitting about a year in between with carbs off
Kurt

[Sb_750]

I fixed it I just blew some air in the thin tube that Leads to the choke still take a couple try’s but it starts nowthanks

[SteveD]

https://youtu.be/Wpd27HTGCv8?t=12

[Tasha 2020]

Another common problem is that the enricher gaskets deteriorate which makes them suck air and not fuel

[barryh]

Another common problem is that the enricher gaskets deteriorate which makes them suck air and not fuel

Enricher gasket have a bit of a reputation for being pulled in. When I hade my carbs in bits and examined the enricher covers I observed that they were not as flat as they might be. The covers look to be die cast and had not had a machined finish. I wonder if that is why they have gained this reputation. I think it's a worthwhile job to re-surface them using wet and dry on some plate glass. That exercise confirmed that mine were indeed not truly flat.