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Post by hakaider on Jul 13, 2005 10:07:19 GMT -5
Hello, I have been a lurker here for awhile and have to say there is some great info on this forum. First off I'm not a ruckuser but a metro rider. Here is what my bike has currently. Gauze filter-80 main jet-1 mm shim- cammed-ported-CDI-daytona variator with 4.5-5 weights ..I think and aftermarket exhaust. PAR valve has been elimintated. Everything runs great till i hit about 36-37 mph then it starts bubbling and sputtering. I went up to an 85 main jet and it ran worse"too rich" I am thinking about changing the variator weights to around 6 and maybe cutting a little off the diaphragm spring. Anything else I can do? Cheers
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Post by Dandy Dan on Jul 13, 2005 15:26:44 GMT -5
The diaphram spring won't solve your top end problems. Your roller weights may be too light to get you all the way to top gear. I'm not sure if the metro is the same as the Ruckus for variator weights but if it is I'd say swap them to 6g as the first thing you try.
Also an 80 jet seems kinda small for a scoot with the POD filter and Cam. I've got almost identical mods in my Ruckus and I'm running a 90 jet with no shim and a little off the diaphram springs and that puts me a wee bit lean across the board. I'm actually faster during hot afternoons that cool evenings. Something is definately wrong because I've got about 10mph on you.
When you switched to an 85 and you said it ran worse was that off the line or on the top end? The Metro actually as a smaller carb than the ruckus (15mm vs. 18mm) and a stock Met has a smaller main jet (72 vs 75) so just copying my setup would likely be a bad idea. I would suggest running it at top speed for a few miles and then shutting it off while you're at top speed and pulling the spark plug for a look. I'm not the expert but I think it's black = rich, white = lean and tan = good. Just get the top end right and you can dial in the rest later with shims and diaphram spring mods.
Also make sure your valve shim gaps are perfect. If you hear a ticking sound when you fire it up then they're too loose.
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Post by chanito on Jul 13, 2005 19:21:56 GMT -5
I totally agree, check your spark plug, also the usual suspects, oil level and tire pressure  |
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Post by hakaider on Jul 14, 2005 7:34:45 GMT -5
Wow thanks for your help guyz! An 85 or larger jet runs worse off the line and at top end on my metro. It seems like the problem started when I changed my exhaust." I am very tempted to run a stocker to see if this elimintes my problem. I used to be able to run my metro 44 mph on steep downhills without the cdi,cam,exhaust. just the rollers got me to these speeds. I have done a plug chop with the 85 and it was too black. The throttle bore on the metro is 18mm just like the ruckus. This bike should really scoot when it's tuned properly. Cheers
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Post by SqUiRmInAtOr/ Phred 501 on Jul 14, 2005 11:38:49 GMT -5
"It seems like the problem started when I changed my exhaust."
Chances are..... Yet to hear of performance improvement w/an aftermarket exhaust.
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Post by Dandy Dan on Jul 14, 2005 13:44:21 GMT -5
Here's what Jason from Battlescooter.com told me today:
"So far and as far as I know, no one that did head work has said the exhaust didn't help. Whether it's worth the $$ before you do that work is up to whoever."
I think the stock piece is perfectly dialed for the stock engine so you won't get an improvement but supposedly you will if your engine is souped up as the stocker becomes slightly restrictive. With that said, I still would suggest taking the pipe off and checking cuz it's pretty easy and the more things you can rule out the better.
Do you know the Metro has an 18mm carb cuz you have the service manual and it says or did you measure it. That's interesting to know. The Ruckus service manual says 18 but for some reason I thought the metro one said 15. If the engines/carb etc really are identical why does the met come with a 72 main jet and the Ruckus comes with a 75?
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Post by chanito on Jul 14, 2005 20:38:40 GMT -5
This is a wild guess, who installed your camshaft?, i wonder if the cam is a tooth off and the timing is retarded so is running out of lungs at high rpms, and the blow thru muffler is just compounding the problem, with all those mods it should be running peachy, and if ("if") you have a 15 mm carb the engine is just starving
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Post by Dandy Dan on Jul 15, 2005 1:13:03 GMT -5
I mechanic I talked to said my Ruckus wouldn't get above 20mph if it was a tooth off but he could be wrong.
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grscum
Junior Ruckster
Posts: 87
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Post by grscum on Jul 17, 2005 20:34:17 GMT -5
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Post by hakaider on Jul 19, 2005 9:46:53 GMT -5
Hello,
My buddy is going to let me use his stock pipe that way I can figure out if its the pipe. after that I'm going to change the roller weights and maybe put another shim in etc. I'll let you know how it goes.
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Post by Dandy Dan on Jul 19, 2005 13:40:09 GMT -5
Good stuff...let us know if you still can't figure it out or if you get it so we can help the next guy better.
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skelly
Junior Ruckster
Posts: 92
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Post by skelly on Jul 28, 2005 22:34:02 GMT -5
I'm stuck at 58km/h. I just did a valve adjust. went fromm 190 to 195 on intake and 200 to 205 on exhaust. Before I did this I seemed to be a couple km slower according to the speedo... I'm lost now. Everything is stock...
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Post by Dandy Dan on Jul 29, 2005 0:21:37 GMT -5
58km/hr isn't that bad. A stocker should go about 60km/hr. From your numbers it sounds like you likely did the valve adjust properly. You're could be losing that 2km/hr cuz your not tucking or don't have a big enough straight away. Also check your tire psi and oil level. Sitting up right a stocker won't do much more than 55km/hr.
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Post by zoomerman on Jul 29, 2005 9:29:59 GMT -5
58km is normal, belt wear and tire wear will slowly make your scoot slower. New and stock my Ruck did 59km, at 2000 km it was doing 58km and at 3000km it does 57km. The rev limiter is cutting in, no loss of power. The upside is you will now be accelerating faster because of the lower gearing.
When you get annoyed at the reduction of topspeed, then you shave a little off your spacer and you're back to your stock speed 59km, or shave a little more and do 61km. I wouldn't suggest you aiming for anything higher than 61km with just spacer shaving. Get a CDI for more topspeed after that.
zoom zoom
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Post by Robo-Mod on Jul 29, 2005 12:56:26 GMT -5
Good stuff...let us know if you still can't figure it out or if you get it so we can help the next guy better. Yer badass Dan! ;D |
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skelly
Junior Ruckster
Posts: 92
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Post by skelly on Jul 30, 2005 0:53:33 GMT -5
Well I have some decently good news. I did 2 drive mods tonight. One was the 1/16th" shorter spacer and 3 4.5 roller weights... I can now do 62km on flat... I'm sure its close to 68km on slopes and drafting off of cars and my fellow Ruck rider
If its a steeper slope the needle is getting towards the temp icon, just past the light...
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