Loss of top end, especially when warm -- reed problem???
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- CharlotteSpreeRider
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Loss of top end, especially when warm -- reed problem???
Spree takes off like a bat out of * when cold. I mean, if I'm just starting it up after being in the shed all night, if I open the throttle wide open the front wheel comes off the ground from stopped. But once it gets warmed up, it chugs like it's going uphill on level ground. It is struggling to maintain 27MPH even on a slight downhill, but will hit 35 on a really long downhill. Uphill it stuggles to stay at 24, if I let off it won't go past 18 - 20 until the road levels out. It doesn't seem to sound right at WOT when warm. It acts like it's at 3/4 throttle.
Anybody know what that is? Air filter is good. Exhaust should be good but might actually allow too much flow now (not enough backpressure?). I'm probably going to pluck off the carb again this weekend and clean it real good again to see if that could be the problem.
One more thing -- right after starting cold, there is lots of smoke, especially on take off under load. But when warm, there is little to no smoke. I mean, I start off, tons of smoke, lots of power, 3 minutes later and a WOT mile down the road at the stoplight, no smoke and no power.
Thanks,
-aseigler
Anybody know what that is? Air filter is good. Exhaust should be good but might actually allow too much flow now (not enough backpressure?). I'm probably going to pluck off the carb again this weekend and clean it real good again to see if that could be the problem.
One more thing -- right after starting cold, there is lots of smoke, especially on take off under load. But when warm, there is little to no smoke. I mean, I start off, tons of smoke, lots of power, 3 minutes later and a WOT mile down the road at the stoplight, no smoke and no power.
Thanks,
-aseigler
Last edited by CharlotteSpreeRider on Mon Apr 28, 2008 10:28 pm, edited 2 times in total.
Mine is doing the same exact thing, my compression is at 65 right now, so i know i need to replace the rings. Replace them now before it really blows and then u may have to get it bored out. If you catch it before you blow it up, then all you will need is a good honing.
1987 Spree 4400 miles 32 mph stock with my 285lb ***
- CharlotteSpreeRider
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- CharlotteSpreeRider
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- Joined: Tue Sep 11, 2007 2:13 pm
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- CBR1000RR
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- CharlotteSpreeRider
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- Joined: Tue Sep 11, 2007 2:13 pm
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- CBR1000RR
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You lower the clip on the needle a notch. To chase a vac leak with the bike idling (adjust it so its nice and smooth or your wasting time) blow an unlit propane torch all over the suspected area, if idle speed changes you have a leak.
I am not a mechanic, nor do I play one on TV. Actually my advice is probably worth slightly less than what you pay to view it.
- CharlotteSpreeRider
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- Joined: Tue Sep 11, 2007 2:13 pm
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- CharlotteSpreeRider
- Veteran OG
- Posts: 709
- Joined: Tue Sep 11, 2007 2:13 pm
- Location: Sanford, FL
I came home early today to work on the Spree. Took carb apart, cleaned the * out of it. It wasn't bad. Put it back together, filled it with SeaFoam and ran it WOT until the smoke went away.
Facts:
- Rings 2 months old, compression over 115 PSI hot
- Motor decarbonized same time as rings
- Spree will not go over about 25 flat
- Exhaust was severely clogged, should be fixed now (used chemical to dissolve)
- Leak is possible.
After I ran it for about 20 minutes, I decided to hold a lighter to the hole on the exhaust. The first time I did it, I'm guessing some unburned gas exploded inside the muffler. I grabbed the camera and did it again:
http://www.youtube.com/watch?v=addQI3JWyI8
Didn't explode this time, but you can clearly see the flame being sucked into the muffler. Is that normal? Anyone else dare to try it and see what happens?
-aseigler
Facts:
- Rings 2 months old, compression over 115 PSI hot
- Motor decarbonized same time as rings
- Spree will not go over about 25 flat
- Exhaust was severely clogged, should be fixed now (used chemical to dissolve)
- Leak is possible.
After I ran it for about 20 minutes, I decided to hold a lighter to the hole on the exhaust. The first time I did it, I'm guessing some unburned gas exploded inside the muffler. I grabbed the camera and did it again:
http://www.youtube.com/watch?v=addQI3JWyI8
Didn't explode this time, but you can clearly see the flame being sucked into the muffler. Is that normal? Anyone else dare to try it and see what happens?
-aseigler
- CharlotteSpreeRider
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- Posts: 709
- Joined: Tue Sep 11, 2007 2:13 pm
- Location: Sanford, FL
- CharlotteSpreeRider
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- Posts: 709
- Joined: Tue Sep 11, 2007 2:13 pm
- Location: Sanford, FL
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- CBR1000RR
- Posts: 4957
- Joined: Sun Apr 16, 2006 11:51 am
- Location: Southern Michigan