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    Fuel line size

    Hello repaired my vacuum petcock and found a bad fuel line, got a 1/4 id thin wall line and it seems too small, is there a metric size or will 5/16 id line work better? Thank you for your time and response. Ron 1981 Yamaha XS650 SH
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    Vacuum Petcock

    Hello I have a 1981 Yamaha XS650 II, I have been getting it ready for this year, I got my NGK LZEH plug caps for the BPR7ES plugs had to order from overseas, now for my next issue I noticed my vacuum petcock leaking at the tank so I removed it and noticed the standoff was sitting in the bottom...
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    BP7ES Plugs Discontinued

    Hello I scored a couple of NGK LZFH caps and some BPR7ES plugs but the terminal nuts were not removable, I got a couple of LZEH non NGK caps, looks the same but are aftermarket no idea what brand, I found some BPR7ES plus with removable terminal caps, was wondering which rout to go with the...
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    BP7ES Plugs Discontinued

    Hello trying to tune up my 1981 XS650 for the season but running into a delima, I have the XS performance coil with 7mm leads and LBO5F caps, the delima is my caps are 5 ohm resistor caps and the new PPR7ES plugs are resistor plugs and no studs, searched for BP7ES plugs to no availability...
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    Earth (Chassis) ground

    Hello I have a 1981 XS650 II all stock, I am having some turn signal issues and part of the trouble shooting I wand to check all chassis (earth) grounds but I want to make sure find and check all of them all, can anyone tell me where they are? I want to make sure I do not miss any hidden ones...
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    Synthetic oil and clutch

    Hello I have a 1981 XS650 using dino 20W50 motorcycle oil and I was thinking on upgrading to synthetic motorcycle oil, I was wondering if anyone had issues with the clutch after switching to synthetic oil or any other issues with seals or ...
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    Wire Straps

    Hello I have a 1981 XS650H and was working on the wire harness under the gas tank and the wire straps broke, I have not been able to find new ones, I currently have zip ties but I am afraid the tab will wear into the tank over time from vibration, anyone have any ideas for new ones or...
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    Exhaust Give-A-Way

    Hello here is my all original unrestored 1981 Yamaha XS650II owned for 9 years.
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    LED Lights and load

    Hello, with the idea of reducing stress on the charging system I changed some light bulbs, I changed the T10 or 158 gauge bulbs to 4 LED white in the gauges (background) 1 each, the license plate bulbs (2) to the same as the gauges and the brake light bulbs (2) to red LED projector bulbs. Here...
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    Giveaway: Chop Source Frame Jig Kit! (ends 11pm CST on March 8th, 2015)

    This is nice count me in. Thank you
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    Let's See The XS's

    1981 XS650 Special II bought in 2007 has 11k miles on it now, never been restored. Ron
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    Season Startup

    Hello, Today I removed the carbs (have not done since 2007 when I bought it) all looked good except when I removed the right side air jet dark brown gas came out of the port, cleaned and commpresed air all ports reassembled replaced needle orings, reinstalled, run and synced runs great again...
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    Season Startup

    Hello, riding season here again, fired up my 1981 XS650 and 1980 XS1100, 1100 great ready to ride, my 650 on the other hand not so great, when parked in November running great, now runs, has power bands but no idle circuit as soon as I turn off the choke I can keep it running on the power band...
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    T.C. Bros now offering a PMA?

    Hello: I found his site. Thank you for your time and response. Ron Stock 1981 Special II
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    T.C. Bros now offering a PMA?

    Hello: does Hugh (Punkskalar) have a website or means of more info on his PMA and any other product(s) or info? Thank you for your time and response. Ron Stock 1981 Special II
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    New member from Colorado

    I have an 1981 XS650II all original in Littleton, looking forward to hearing more XS650s in Colorado
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    Turn signal issue

    Hello got out a schematic troubleshoot from the auto cancel unit and found the reed switch in the speedo shorted out, so I disconnected the auto cancel unit and the signals work properly (manually), so no more auto cancel, it worked like it was supposed to until now. switch is clean (done last...
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    Turn signal issue

    Hello, I have a 81 xs650H and have a interesting turn signal issue, both right and left flash but you have to hold the switch to the right or left depending on direction, as soon as to release the switch to recenter lights go off instead of staying on, after a while it will work normally. any...
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    Side Covers

    My bottom mounts broke off also but I used rubber gromets in the covers with clevis pins going through the gromets from the cover through the gromets on the frame , washers and clips to hole them on , I still wanted easy access to my tool bag without the use of tools to get the cover off.
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