Needle Jet O Ring Mikuni BS38 CV

[louis]

Hey guys, my very first motorbike, a 1973 tx650, was feeling brave so decided to rebuild the carbs. Wish I didn't in hindsight but here I am. Have had them out 15 times in the last week trying to sort this and finally got the bike running nicely.

My only question is, the o ring on the needle jet in the LHS carb was damaged during the process and I haven't yet replaced it. I managed to get it back on but I highly doubt it's completely sealed. Will this just make for a slightly richer mixture and not a major issue? Or should I replace this o ring as a major priority and keep the bike off the road?

 

[angus67]

That side will run extremely rich to the point of not running. If it still is running, it will only get worse.

 

[louis]

Thanks, I'm having a lot of trouble finding a 1mmx4mm o ring over Christmas here in Australia. No one has any, I've managed to find a 2mmx4mm o ring, I wonder if this would work if I worked it in "wet" with a lubricant?

 

[5twins]

The 1 x 4 is a pretty snug fit. I doubt you'll get a 2 in there.