How to increase top speed?  By  blarboose (Read 8,816 times)

Here we go, got a few pictures. The crack is kinda hard to see, but its right to the side of the nut.

There you go JB weld is great stuff you can even drill it.
Alleyoop

Quick question for you; in your experience with JB weld, how long do you need to let it cure for? The package says it cures in 15 to 24 hours, so Im not even going to be TOUCHING it until its been 24 hours. But in your experience, does letting it cure for longer before installing the part or messing with it help at all? or would I just be wasting my time by letting it go for longer than 24 hours?

UPDATE!
Ok, I put on a second coat of JB weld on the manifold last night, since it was already 11PM and I didnt feel like starting to put everything back together that late. I let the second coat dry overnight and put everything together this afternoon.

Took it for a ride, and made it up to 60MPH on a flat section of the freeway. : D It also did significantly better on the hills. The one hill that I could previously only do 20MPH going up, I was able to do 40MPH, and I probably could've gotten it going even faster up the hill, but I was coming up to a curve. The acceleration is also a lot better than it was before. Cleaning out the carb jets seems to have worked wonders. : )

I need to adjust the idle timing a bit, and Ill probably fiddle with the fuel mixture while Im at it (I did a rough adjustment before the test ride so I figure I can fine tune it from there) but other than that it seems to be working much better that it was before I cleaned the carb and then the manifold cracked.

I was going to have my brother ride passenger, so I could see how it does with an extra 150LBS on it, but it decided to rain just as I was pulling into my drive way. :-p

Im going to test it with a passenger once it stops raining and see how much of a difference there is.

Once again, I wanna say THANK YOU SO MUCH to everyone for their help, especially Alley. Youve all saved my butt here more than once. X D

The air leak in the manifold happened AFTER I cleaned the carb jets. My original problem (lousy top speed) was fixed by cleaning the jets. Then when I put everything back on, the manifold cracked which greatly weakened the vacuum going to the fuel pump, so much so that it couldnt sustain enough fuel at lower RPMs.

I currently have my original intake manifold, and the one i got to replace it. The original is back on the bike, all patched up with JB, and working great. The newer one, Im gonna give another few coats of JB to make it extra durable, and keep as a spare. If the one on the bike breaks, I have another ready to go.

XD its kinda funny. I wasnt even intending on doing that, but I kinda did. I have an old walmart bag in my garage that I use as a trash bag, but whenever Ive replaced parts I put them in a different bag, just because. As a result, I havent thrown out any of the old parts when Ive thrown out the trash bag. So now, I have a spare manifold, sparkplug, CDI, horn, fuel filter, fuel pump, carb diaphragm, tail light cover (half of one anyway), air filter, and turn signal bulb.

What rpms do you reach on a straight run ? That will help answer your roller weight question .