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Old 04-22-2014, 04:48 PM   #141
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Also my throttle cable has a lot of play in it and I need to adjust my clutch because it doesn't engage until you've got almost a full grip on it. I'm going to find something to about this bike until it needs another restoration lol
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Old 04-23-2014, 09:27 AM   #142
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Quote:
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Jae, no, im using a single carburetor
Ok, that makes more sense as to why your jetting is so far off "standard". I didn't realize that you just essentially used one of the pair. Personally, I'd think you'd go to a slightly larger carb since that one is now feeding two cylinders instead of just one.
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Old 04-23-2014, 07:57 PM   #143
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I think thats where im headed. If you know where i could get my hands on a good carb for not a lot, let me know.
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Old 04-24-2014, 12:24 PM   #144
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Might try someplace like the chopcult.com classifieds. Seems like a stock Harley 883 carb might be a decent starting point.
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Old 04-28-2014, 04:41 PM   #145
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..
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Old 04-28-2014, 04:43 PM   #146
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The "after" picture isnt as understandable as the "during", but that's leftovers from a burnout
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Old 04-28-2014, 05:24 PM   #147
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I'd do a fresh plug check before running it lean! Rich may run like ...lean could kill it for good!
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Old 04-28-2014, 05:29 PM   #148
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i just pulled the plugs about an hour ago and cleaned a lot of suit off them. ... or at least i tried to. they were pretty dark.
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Old 04-29-2014, 10:38 AM   #149
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That's a good indication that it was running rich at one time, but make sure you check them again with your new jetting. I wouldn't be surprised if it's a little lean, but wouldn't think you'd need to go up more than maybe a couple of jet sizes. Seems like you'll likely end up with the rear cylinder running a little more lean than the front, but that's just a guess.
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Old 04-29-2014, 02:15 PM   #150
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Replace the dang plugs, run it, then post pictures. I'm not trying to scare you, but if its running too lean you CAN/WILL do damage in a hurry.
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Old 04-29-2014, 04:47 PM   #151
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I'll get some new plugs. I know the bike was running really rich when i had the drilled jet on. Right now its got a jet that makes it run lean. Im waiting on a few jets to arrive in the mail. Jae, why do you think the rear will run lean? If one carb is feeding both cylinders shouldnt it be balanced?
More than anything else, i think, i need my dang clutch adjusted. Right now the friction zone engages when the lever is almost all the way out. I plan to resolve this tomorrow with my knowledgeable assistant.
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Old 04-30-2014, 12:22 PM   #152
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Jae, jetcycles, you guys were totally right about the spark plug deal. I replaced the front plug and it runs like a mad beast now. Playing with jetting still. New thought process. Its not idling well. Things are really looking good though.
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Old 04-30-2014, 12:51 PM   #153
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Quote:
Originally Posted by loosenoose View Post
I'll get some new plugs. I know the bike was running really rich when i had the drilled jet on. Right now its got a jet that makes it run lean. Im waiting on a few jets to arrive in the mail. Jae, why do you think the rear will run lean? If one carb is feeding both cylinders shouldnt it be balanced?
If the pistons were moving up and down at exactly the same time (both at TDC at the same time), such that you had a perfectly even firing pattern of once every 360 deg. crank rotation (think parallel twin), then yes, they'd be pulling exactly the same amount. As it is, it looks like the V750 is roughly 90 deg. with a shared crank pin, meaning that TDC for F and R cylinders is reached 90 deg. apart. That means that one of the cylinders will be firing closer to the other. Whether rear closely follows front or vice versa depends on how the intake/exhaust event timing and crank rotation are set up on the engine.

This is very pronounced in a Harley, and is what produces the "potato potato" exhaust pattern. With an uneven firing pattern pulling through a single carb, it is impossible to get even flow to both cylinders without exhaustive intake tuning on a scale well past our resources. This probably wouldn't be noticible at idle or low rpm, but I would think it would become more pronounced in higher rpms.

I could be talking out of my here, but this is my initial impression.
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Old 04-30-2014, 05:57 PM   #154
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Xv750 test run:
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Old 04-30-2014, 07:18 PM   #155
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so today, nick and i were able to get the exhaust leaks (mostly) fixed. it's not bad now. nick got the brake lights working, and some other little things. we played with the jetting and found out the front cyl was running due to the burnt out spark plug.
on friday i should be getting off work early. if i do, i'm hitting the cycle shack north, for a couple of fresh spark plugs and muffler packing. this should get my noise level a little less rediculous, and fresh plugs will be nice.
i dont think i need to change the jetting any further. i have wound up with the stock main jet. the pilot, i think, is what i got with my sigma 6 carb kit. on friday, i plan to take the bike to a good ole boy shop in my neck of the woods, and get an inspection sticker. i can then ride to work (if making it to the shop is no great feat).
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Old 05-04-2014, 07:59 PM   #156
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vupyde3e
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This is what i get for repacking mufflers and new spark plugs. A broken starter switch.
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Old 05-04-2014, 08:35 PM   #157
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Quote:
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vupyde3e
I swear, this bike.
This is what i get for repacking mufflers and new spark plugs. A broken starter switch.
bummer
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Old 05-04-2014, 09:58 PM   #158
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That control pod was around $40 and all of the connections are soldered and heatshrinked.
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Old 05-14-2014, 11:50 AM   #159
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then what happ'd loose?
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Old 05-14-2014, 06:02 PM   #160
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Been busy moving. Ive got a new home keeping me busy. Nothing fancy, but it gets the job done, and i can afford it.
Bikes got new tires and brake shoes sitting there, waiting to be put on. Ive just been busy with house stuff.
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