Stiff diaphragms?

**10100100** · 21st August 2011, 20:02

Hey Guys,

I have a CBR250R MC19. Year of 1989. I have just bought this and am fixing it up as it had some slides. When purchased I was told that the carbs need tuning. I took it into my mechanic and was told that no, the bike had stiff diaphragms. If i could get them in from japan they would cost around $150 each, I need four and don't really have the money to buy them all :/. He told me that the carbs on these bikes are dependent on a vacuum to suck the fuel thorough and that maybe if I rolled on the power instead of on/off (don't really know how to explain this hope you guys can understand) I may not encounter the flat spot these diaphragms are causing... I have not gotten my License yet (waiting for the fairings) and so I can't ride it to test. Is there any other way to fix this problem other that buying new ones?

God Bless,
Luke

**Oblivion** · 21st August 2011, 20:06

Have you tried ringing wreckers in the area? I'm sure some of the people on here could hook you up with some numbers that you should try.

**bogan** · 21st August 2011, 20:13

Are the diaphragms the same part as the slides? (think they almost always are) I know for the RC31 we can get the slides reconditioned, and new rubber bits put on for around 1/2 to 2/3 the price iirc. I can try and hunt down who does it if that might be an option for you.

**nzspokes** · 21st August 2011, 20:19

Try this guy, http://www.smebike.info/

Got told by honda new float valves for my bike were $80 each and would take 8 weeks. He had the 2 I need in stock with gaskets for $30. Saving me $130.