in need of more speed

[mysta2]

So I'm liking my bike more and more as I hack it up and piece it together. But the consistent weak link is the motor, it's not bad for scooting around town (although that's a fairly rediculouse description of where I live) but I would certianly not be comfortable with it on the highway, at 65mph in 6th gear she's pretty tweaked, and I like to be going at least slightly faster than the traffic around me so that everything in my future is ahead of me.

any recomendations for another twin that will fit in my rails... air head? Trionda maybe? or just a bigger honda? Or maybe just boring out my current 360 and swaping the sprocket.

[cb360]

You obviously know a lot about this already. My friends think I'm a mechanic because I can clean a carburetor, but you are talking about places I've never been and may never go. Could you put a motor from a CB 750 in there? The frames from that era sure look similar. Maybe Gummiente or Techbmw or one of the other master mechanics will weigh in. I'd be interested to know since we probably have the same frame.

[Joe Mc]

Have you looked at XS650's ? They have decent power and the cool inline twin look.

Perhaps you just need to change sprockets on your 360. My 400 is a little over geared and will cruise at 70 mph no problem. I've had it up to 95 with rpm's left.

[mysta2]

yeah the only differences between our two bikes (stock ) should be the gearing, exhaust and possibly the placement of the idiot lights.

I forgot to say this in my post but it would take a personal revalation for me to consider a 4 cyl (they sound like hairdryers ) I was actaully wondering what was readily available as far as larger parallel twins from honda or whomever.

[TechTMW]

I've not done anything like this -

Some Ideas - The later hawk 400 or nighthawk 450 engines might fit. (Both twins) But they are blocky and not as attractive as the 350/360

If you are into welding up new mounts, you might be able to shoehorn a Yamaha xs twin into there.

A BMW airhead wouldn't fit, I'm almost sure of it. It's too long for the frame, plus you'd have to find a way to convert the shaft drive to a chain.

Buy a Katana 600 or something cheaper like that for speed. Keep this bike as it is. It's a beautiful mild custom, which I'm sure draws plenty of attention. Everything works asthetically on it, but if you put another engine in there, I think it will destroy the overall effect, unless you really sink alot of $$ into it to make everything proportional again.

[TechTMW]

Just looking at your bike - If you found a wrecked ducati 620, that engine might just squeeze into there .... Ugh too much effort !!

Unless you are buying a modern engine, you have to source one that is in good running condition, which could almost be a bigger pain in the rear than finding a way to make said engine fit in your frame.

I guess the best thing to do is get your frame dimensions, go down to a local wrecker, and see what kind of stuff they have in stock from recent wrecks, whetever,

No I take that beack, the easiest thing to do would be to get a Katana or something. !!

[Joe Mc]

The later hawk 400 or nighthawk 450 engines might fit. (Both twins) But they are blocky and not as attractive as the 350/360

I resent that! I think the 400 in one of the nicest looking twins out there.

[mysta2]

there in lies my dilemma, I like the way the 360 looks and sounds, but when you live in Texas everything is far away and there're highways everywhere so not being able to get on one is annoying if I actually want to go somewhere. I think my best option is just to work a bit at tuning the 360 and swapping the sprocket, hopefully I can cancel out some of the low end loss.

Oh yeah I knew there was a reason an air head was a bad idea... but I couldn't remember why I had come to that conclusion. Maybe I should just look into another bike like that one I posted before, BMW for a highway flier.

[mydlyfkryzis]

My 76 CB360t will do just over 100 mph if I lay down on the tank and about 95 if I don't. The CL were a little lower geared, and probably top out around 90.

I always need to sync the carbs and adjust the timing frequently. If the timing is off on one cylinder, you will lose quite a bit of power. With a fresh tune, the bike will lift the front wheel off the ground about an inch under full throttle in first gear and sometimes a little when I shift to second. After about 2 weeks, the tune starts going away and the acceleration is a little less vigorous.

The CL360 should be able to get speeding Ticket in any state. If you can't get much over 60, I would reexamine your state of tune and valve adjustments.
Clean and adjust the carbs too if you already haven't

Also, check the rubber diaphragms in the CV carbs. If you have any holes, the carb will not open all the way and cause a loss of power. A little cloth fiber mixed with some silicone rubber (thinly applied) will temporarily fix the diaphragms until they can be replaced. They are expensive new, your best bet is to get some used carbs off E-Bay if you need them, and hope they have a good one.

[mysta2]

hmm, that makes me feel better. Mine's surely in need of a good tune.