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Hello all,
Had the bike ('78 GS750) going for a little while now, probably 400 or so miles of commuting to school and wherever else on it, saving myself an assload of money on gas (pardon the expression). Purchased it this spring, cleaned the carbs out, installed new clutch plates, and a kickstart shaft oil seal, and she's been running pretty good. I should have synched the carbs and all to get the idle perfect, but it was manageable, and I didn't want to mess with it as I had had enough frustration for a while and just wanted to ride. Well, this past weekend the gf and myself hopped on and rode out into the countryside, stopping here and there, tooling around all afternoon. 60 - 80 miles maybe...not quite sure. We're on our way back home, and almost there, when the bike starts surging and losing power. It will maintain whatever speed you want (but will "surge"....jerkiness....don't know how better to decribe it) and when you accelerate it does so under protest, and slowly. No strange noise accompanied this change, just started doing it out of nowhere. I've pulled the plugs, and although #4 was a little darker than the others it was by no means fouled. I cleaned it, put it back in, and there was no change. I thought maybe it would have fouled out from burning oil, as when you stop at an intersection you can see faint whisps of white smoke coming from the airbox, but the rest of the plugs are perfect, and #4 was not remotely bad enough to be fouling out.
Any and all ideas as to what my be going on would be appreciated. I've been riding the bike to school, so I can afford to go, but now I've had to revert to driving the damn Jeep Grand Cherokee (14mpg....aaaaaaah!!) and am going to bleed myself dry if I can't get the GS back on the road. Thanks much,
Ryan
rmueller23@yahoo.com
Had the bike ('78 GS750) going for a little while now, probably 400 or so miles of commuting to school and wherever else on it, saving myself an assload of money on gas (pardon the expression). Purchased it this spring, cleaned the carbs out, installed new clutch plates, and a kickstart shaft oil seal, and she's been running pretty good. I should have synched the carbs and all to get the idle perfect, but it was manageable, and I didn't want to mess with it as I had had enough frustration for a while and just wanted to ride. Well, this past weekend the gf and myself hopped on and rode out into the countryside, stopping here and there, tooling around all afternoon. 60 - 80 miles maybe...not quite sure. We're on our way back home, and almost there, when the bike starts surging and losing power. It will maintain whatever speed you want (but will "surge"....jerkiness....don't know how better to decribe it) and when you accelerate it does so under protest, and slowly. No strange noise accompanied this change, just started doing it out of nowhere. I've pulled the plugs, and although #4 was a little darker than the others it was by no means fouled. I cleaned it, put it back in, and there was no change. I thought maybe it would have fouled out from burning oil, as when you stop at an intersection you can see faint whisps of white smoke coming from the airbox, but the rest of the plugs are perfect, and #4 was not remotely bad enough to be fouling out.
Any and all ideas as to what my be going on would be appreciated. I've been riding the bike to school, so I can afford to go, but now I've had to revert to driving the damn Jeep Grand Cherokee (14mpg....aaaaaaah!!) and am going to bleed myself dry if I can't get the GS back on the road. Thanks much,
Ryan
rmueller23@yahoo.com
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