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SOHC/4 Bikes / Re: Loud bang. Misfire?
« Last post by felicious on Today at 12:52:03 PM »
I ordered a new cap to be safe last week. Will try that and a new plug.
Makes for awesome sound effects though. :)

Does misfiring cause any damage?
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SOHC/4 Bikes / Re: Testing the oil valves
« Last post by dave500 on Today at 12:46:15 PM »
no they aren't a one way valve just a small restriction,make sure you don't enlargen the hole if your poking it.
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SOHC/4 Bikes / Re: How hot is my engine?
« Last post by cadunkle on Today at 12:42:50 PM »
Interesting video but no sense of time frame from cold start? Also my engine is hot in all different areas after riding around for 15+ mins. Just idling or a quick 5 or less min ride and it is not really at temp and stabilized all over... Just from going over it with an IR gun. I find head temps typically about 250-260 going around it, but on right side it's closer to 270*. Might be a little lean in that cyl perhaps, but that is my experience of max head temp just over 270* immediately after a long ride. Probably gets a bit hotter in practice when working it hard.

FWIW I used Duplicolor engine paint rated at 500* and it is fine. No heat related failures I've noticed yet, and I suspect any of that would be hidden from sight right at the exhaust port. My experience with this same paint on car engines is it hold up pretty well, but will often burn off around exhaust ports on engines where the port sticks out from the head a bit without a coolant jacket around it.
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SOHC/4 Bikes / Re: need rear tire recommendations for CB750K2
« Last post by Vinhead1957 on Today at 12:18:06 PM »
It matters what you have on the front. In the day, we wanted a matched pair for the bike.  continental was preferred but there are newer ones today !   I love the Avons I have but I'm not. That aggressive in the twisties.
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Other Bikes / Re: Yes... I got a Kaw Z 900 also
« Last post by Bankerdanny on Today at 12:17:14 PM »
I had the Gerex on my GoldWing, I liked it a lot.
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SOHC/4 Bikes / Yamaha FZ1 swingarm on a 78 CB750F3...
« Last post by jamracing on Today at 12:15:33 PM »
My first post, but not my first bike...
Just picked up a mint, pristine all original CB750F3 with 29,000 miles. Being all original makes me crazy, and i already have a list of things i'd like to do to it!
1. FZ1 aluminum swingarm (http://www.ebay.com/itm/361075629964)
2. Single seat
3. Upgraded brakes from a CB750 dual cam/CBR600F3
4. 520 chain/sprocket conversion kit
5. Superbike (flatter) bars

Thoughts on the FZ1 swingarm? I don't have the measurements yet, but has anybody done this? Any other swingarm recommended?

Thanks!
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SOHC/4 Bikes / Re: Master Cylinder cb750
« Last post by Jerry Rxman Griffin aka MuthaF'er on Today at 12:13:55 PM »
Looks like thats a one year one model design. Buy a kit from Honda.

45530-404-315  MASTER CYLINDER SET  $41.27 Motogrid.com

http://www.partzilla.com/parts/detail/honda/HP-45530-404-315.html $33.22 Plus it lists all the models the KIT fits
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SOHC/4 Bikes / Re: Master Cylinder cb750
« Last post by yesteryear on Today at 12:06:21 PM »
I guess from all the responses recieved there is nobody on this site that has a k7?What happened did the states scrap them all?
Yesteryear
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SOHC/4 Bikes / Re: Loud bang. Misfire?
« Last post by Vinhead1957 on Today at 12:02:24 PM »
Could be that plug is fouled and only fires intermittently ! Fuel is collecting in the exhaust and when it does fire the hot gases ignite what makes it into the exhaust.  Try a new plug and if you haven't already clip 1/4 inch  off the plug wire and reinstall the cap.  It helps to roll the rubber seal back up the wire to get that cap in tight and then roll it back into place
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