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Post by geh3333 on Jul 20, 2014 15:49:44 GMT -5
Hmm... well I dont have a GoPro camera or anything so I dont have any way of recording video while riding. I could make a video of it while its on the center stand, but thats gonna be way different than when its actually got a rider on it and its on the road. For the record, when its up on the center stand, it'll get up to maybe 6000RPMs. I went for a ride today and paid extra attention to the RPMs at various speeds. Here's what I got: Idle speed: 2000 to 2200 RPMs 5-15 MPH: 2500to 3000 RPMs 16-25 MPH: 3200 to 3700 RPMs 26-40 MPH: 3800 to 4200 RPMs 41-50 MPH: 4400 to 5000 RPMS. The only way I can get above 40MPH is if Im going at least a little bit downhill. I have to be going down a fairly large hill to get up to close to 50 MPH. If you have any ideas for how I can get a recording of the engine while actually riding, please let me know. So would the 12 gram weights have more of an effect on my issue than the 11s, or vise-versa? I'm gonna throw this out there it may sound stupid but the more I think about if it's not the compression it sounds as if something is holding it back . Did you ever mess with the rear drum brakes ? " that is if it has drum brakes " I know it sounds dumb but r u sure they are not engaged ? Only hitting 6000 rpms on the center stand is terrible. |
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Post by ezgoin28 on Jul 20, 2014 16:17:55 GMT -5
This seems to be the lowest gear set I could find for more torque. Is there a lower gear set out there? Should I start a new thread? I am sorry if I am in the wrong spot.  |
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Post by blarboose on Jul 20, 2014 17:38:21 GMT -5
UPDATE! I adjusted the fuel mixture screw last night to make the mixture richer, and the stumble at WOT is like  % gone. I figure I can tweak the mixture screw a bit more and get rid of it entirely. The low power/speed going up hill was still an issue, and my top speed didnt seem affected. Im going to order the 11 gram weights and see what that does for me. I also did order a diaphragm (this was before alley said it probably wasnt the issue) which should be here this week so Im gonna see if that helps at all. |
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Post by geh3333 on Jul 20, 2014 20:35:55 GMT -5
What about your rpms are they the same ?
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Post by blarboose on Jul 20, 2014 22:33:36 GMT -5
What about your rpms are they the same ? Yeah. I didnt notice any change in the RPMs or the top speed. Just the stumble/lugging at WOT was pretty much gone. |
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Post by geh3333 on Jul 21, 2014 23:50:34 GMT -5
If your not cmfortable or not to sure about what your doing you may want to order a new carb . They are very cheap . I once had a problem with my scoot not running right , it was right after I bought it used . I cleaned the carb and checked it over and it still didn't run right . I ordered a new carb and it solved to problem .
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Post by alleyoop on Jul 22, 2014 0:03:02 GMT -5
Something is definitely is not right, Do you know what gram weights are in the Variator right now? Can you get a VIDEO of it on the center stand and open the throttle up. And I mean give the throttle a quick twist wide open and let go. I want to hear it rev up and rev down.
Alleyoop
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Post by geh3333 on Jul 22, 2014 0:17:16 GMT -5
I'd think if it were a cvt issue like a stuck clutch pulley or a variator issue the rpms would rise .
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Post by alleyoop on Jul 22, 2014 0:29:06 GMT -5
I am thinking he has heavy weights in there like 14 or greater grams, which would produce those rpms.
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Post by geh3333 on Jul 22, 2014 0:59:38 GMT -5
I've never heard of a stock 150cc scoot only hitting 4000 rpms on a straight run . Also he adds 25 lbs and loses 10 mph . Unless for some reason he has 17 or 18 gram weights in there . Even then the loss of 10 mph after adding 25 lbs dosent sound right . Hopefully we can help him get going.
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Post by alleyoop on Jul 22, 2014 1:05:11 GMT -5
I have experimented with weights from 10s to 13s rollers and Dr. Pulley Siliders and if I put 13gram weights in my 150(which is by the way 182ccs) the rpms will not go above 6500 rpms. So heavy weights will drop his rpms like crazy. Adding more weight will even be worse the power is already low and not there so adding more weight will even slow it down even more. Even a good head wind it will be a real dog.
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Post by geh3333 on Jul 22, 2014 1:24:51 GMT -5
Yeah mine will hit 6000 with 13grams and a new belt , of course we have to take into consideration that we have taller gears .
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Post by phssthpok on Jul 22, 2014 5:46:07 GMT -5
Are you the original owner (first purchaser) of the scoot?
If not, then it's possible the PO installed some taller (read: TOO tall) final drive gears. This would explain the lack of hill pulling power AND (believe it or not) your reduced top speed ability. Your speed/RPM scale you listed at the top of the page seems to bear this out.
An engine (any engine) can only make 'X' amount of power. If you exceed it's capabilities, then performance will suffer. I've been shopping gears on Ebay lately and I've found gear sets with ratios as tall as 2.2x. if a PO put in a set like that without doing anything to increase the output of the engine itself, then it is logical to presume that performance would be adversely affected.
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Post by blarboose on Jul 22, 2014 6:09:17 GMT -5
The bike is a 2005, and has had 2 previous owners. I have no idea what size weights are in it right now, but I can get that video, Alley, when I get home from work today.
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Post by alleyoop on Jul 22, 2014 12:12:28 GMT -5
Blareboose, I suggest you take the Variator out and check out the weights, if you do not have a scale that can register in grams take one to your post office and have them weigh it. You have to do some checking otherwise we are all just guessing at what it causing the low rpms.
Alleyoop
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% gone. I figure I can tweak the mixture screw a bit more and get rid of it entirely. The low power/speed going up hill was still an issue, and my top speed didnt seem affected. Im going to order the 11 gram weights and see what that does for me.
..BAD TO THE BONE..
