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    Point Housing Gasket and O-Ring

    The gasket and seal kit I have includes a gasket and an o-ring that goes between the point and advance housing and the cylinder head. Is this similar to the tappet adjuster covers in that you use one or the other but not both?
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    Crank End Play

    The crank in one of my engines has some end play, I measured 0.4 mm with a dial indicator. Does anyone know if there is a spec on this? I've looked and looked but no luck.
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    78mm Pistons

    Anybody ever used these? https://www.cruzinimage.net/2017/08/29/74-81-yamaha-xs650-706cc-bigbore-pistons-kit-78mm-447type/ I currently have JE 77.5mm pistons and pretty sure it's time for a rebore and new pistons since they have around 65K miles on them.
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    Rephased Cam

    Was wondering what others have used for a 277 rephased cam. I have a Megacycle rephase in my current engine but that was very pricey, I think around $500 when I got it in 2007. I'm putting together another rephased engine and was wondering what others are using. Was looking at Hugh's service...
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    Cam Timing Question

    Probably been answered somewhere already but how much does the cam timing retard as the cam chain wears?
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    Clutch Drag When Cold

    I have been having some issues with my clutch dragging when cold. Even if I let the bike warm up for several minutes after starting it often stalls the engine when I put it into first. Needless to say this is not so great for the transmission either. I had it apart over the weekend and cleaned...
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    Rod Top Bearing Oil Modification

    650 Central has a service where they drill holes in the pistons from the oil ring groove to the rod top bearing to improve oiling. I have been running JE 700cc pistons in my bike for years and as far as I knew this modification was already present in the pistons from the factory. Am getting...
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    Rod Big End Side Clearance

    I just got my crankshaft back from being rebuilt and was checking clearances, etc. I found that the big end side clearance on one of the rods was under spec. From the info I have the minimum clearance is 0.0059" but I measured it at 0.004" Is this a problem?
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    Crank Rephase Question

    After a crank is rephased is there anything that needs to be done to true the center crank joint? Can the center joint be trued at all since it is a spline?
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    Yet Another Slipping Clutch Thread

    I have found another source of slipping clutches that I haven't found any mention of. I have noticed that the amount of free play in my clutch varies a bit with load and also depends on the gear I am in. If I am cruising in 5th the free play is the same as when I am stopped. Under a load in 4th...
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    Valve Seal to Keeper Clearance

    Have my top end apart to replace a broken valve spring and valve seals and see that I don't have enough clearance between the keeper and the seal when the valves are fully open. Measured this by assembling the seal, valve and keeper assembly with no springs and used a caliper between them and...
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    Electric Starter

    Here's a new one to me. I have had all of the usual problems with electric starter engagement, last time I fixed it was a year or two ago and up until now it has worked almost perfectly. Today I was out for a ride and after a stop the starter went for working very well to almost never engaging...
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    XS650SE OEM King and Queen Seat

    Anyone have one of these in good condition they want to sell? Mine is cracked and I am looking for a replacement or may get it recovered.
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    Valve Cover O Rings

    Been using these for my valve covers with good results. In practice I find that it is best to replace them when I have a cover off but at this price who cares. https://www.grainger.com/product/GRAINGER-APPROVED-Round-Medium-Hard-Buna-N-O-41KX45
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    Broken Elephant Foot Valve Adjuster

    Went to adjust the valves the other day and when I went to loosen the lock nut on one of them it snapped right off with very little effort. Wow, good thing that didn't happen when I was riding! Has anybody else ever had this happen on anything? I did some searching on the web and found a few...
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    Clattering Sound When in 5th Gear

    Was out for a leisurely evening cruise and suddenly started hearing a clattering sound. At first I thought it was a valve but as I played around with it I discovered it didn't make a sound under any other conditions except in 5th gear. Rode the rest of the way home in 4th without a bit of...
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    Clattering Sound in 5th Gear

    Was out for a leisurely evening cruise and suddenly started hearing a clattering sound. At first I thought it was a valve but as I played around with it I discovered it didn't make a sound under any other conditions except in 5th gear. Rode the rest of the way home in 4th without a bit of...
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    The Infamous XS Dragging Clutch

    Has anyone ever found a permanent solution to the dragging clutch problem in the XS? By cleaning up the basket and the hub where they mesh with the plates I can make it work perfectly for a while... say 20,000 miles or so. IMHO the biggest problem is wear at the hub where the relatively thin...
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    Aftermarket Oil Filter Question

    Anybody know if the aftermarket paper oil filters, such as the one Mike's carriers significantly reduces oil flow? Seems to me that they would be quite a bit more restrictive than the stock screen.
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    Crankshaft Assembly

    Using the nuts and bolts method I found on one of the forums I was able to split my spare crankshaft to rephase it to 277. I have ground out a new keyway for the cam drive sprocket so it is ready to be reassembled. What should I put on the spline for reassembly, oil, Locktite? I am not going to...
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