I have a Factory pipe on my blaster and have always struggled with it hitting the hull. I’ve replaced the engine mounts and stuck a piece of turf in between to minimize the issue. I’m in the middle of a top end re build on my motor so I was thinking about having the manifold milled down to move the pipe away from the hull. Has anyone done this? There is plenty of meat on the manifold so I don’t think it would cause any issues.
Factory pipe on B1
- Thread starter lthays
- Start date
Big Kahuna
Administrator
- Location
- Tuscaloosa, AL
Yes, it has been done. Post pics of pipe and where it hitting, I have taken a rubber mallet to my BPipe Chamber before to get clearance from bedplates and hull sides. you may can just get away doing that. Dont make big hits, you want to do alot of smaller hits and slowly massage the pipe to get clearance.
- Location
- Charlotte, NC
Also keep in mind that milling the manifold will shorten the tuned length of your exhaust a little which will give more rpm but may slightly hurt bottom end. An old racers trick was to mill the manifold The easiest method would be to lightly tap the chamber with a hammer. Many light hits in a circular pattern will flatten the area without creasing the metal or denting it. You won't loose any power doing that..i did the hammer tapping method to fit my tnt ss chamber in my superjet.. you could also adjust the bracket abd lord mount a little on the flywheel to get the chamber closer to the engine.
waxhead
wannabe backflipper
- Location
- gold coast
Your right about the tuned length on these but in the case of the yamaha it wakes them up due to the exhaust tunnel aera being to big on them its supposed to be 90% of the exhaust port out let and i did work it out as 110% or close enough. This is one of the reasons that the dry exhaust manifold works so well on them. So in short i'm not disagreeing with you as you 100% correct but on the 62t its a great thing to do
I don’t have access to a mill myself right now so I’d have to pay a shop to do it, I’ll have to look to see if I can tap the side of the pipe in some with a hammer if I can’t find a shop to do it for me this week. I guess I never considered that because B pipes are so expensive haha. Thanks for all the suggestions! I’ll update this later this week with the direction I went and the results.
- Location
- Charlotte, NC
I'll be pulling my engine and pipe in the next day or two. I'll try to snap a photo of the chamber where I had to massage it with a hammer. It's not complicated at all. Just takes a little time.
- Location
- Charlotte, NC
Or sand the hull a little.