So I bought a used helix from a fellow on here, from an RX1. I checked the parts fiche and the 03's had an 8BV number and there also was another one for an 8FA number also. From what I have checked in the Tech section, I wound up with an 8BV helix, so am I correct in saying I did not get a 51/43? Are all the 51/43 helixes 8FA numbers? I am confused...  
  
				
			 
  
I think they may have superseded the part # after 03.  I remember having the same issue when it went to 8FA
Does the helix look like a straight angle or does it have a slight curve? I know the RX-1/Apex helix from Yamaha is called a 51/43 but Turk measured them before and there more like a 48/42 in real life so not much of a curve to them
				
			Does the helix look like a straight angle or does it have a slight curve? I know the RX-1/Apex helix from Yamaha is called a 51/43 but Turk measured them before and there more like a 48/42 in real life so not much of a curve to them
			
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							Forgot to ask,   are there any numbers after the 8BV?   There is a page for yamaha helix identification in the tech section.   You may have possibly gotten a straight 45
				
			The mountain helix run a strate 45.
You want a 8bvfa helix - 51/43
				
			You want a 8bvfa helix - 51/43
It has a 71 on it. I am going to go run it today and see. If that s the case Ill just have to get another. Throw this one on the shelf...
However, it does appear to have a curve to it. Well see what happens I guess. The member I purchased it from responded to my pm and told me it came from an RX1, and it is a 51/43.
				
			However, it does appear to have a curve to it. Well see what happens I guess. The member I purchased it from responded to my pm and told me it came from an RX1, and it is a 51/43.
			
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							9801srx
Member
8bv 71 = 47 degree . stock srx700  helix.
				
			Stock srx 700
viper 700
600 redhead single pipe
				
			viper 700
600 redhead single pipe
Well I guess Ill go see what she does. Test test test test....
				
			 
	 
 
		
 
 
		