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Post by ital on Apr 28, 2015 11:03:24 GMT -5
Can I use sliders instead of rollers? I am really tempted to try 11G sliders... would that cause me to over Rev?
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Post by ital on Apr 28, 2015 11:18:59 GMT -5
You have enough room to go with 11.5 grams rollers. That should get you up around 7500 7700 RpmS . you have to stagger 12 and 11 grams weights. I only went for a 1/2 mil drive. I will take it to work on Thursday and see what are top RPM on long stretch and report back. Ideally I do not want to go over 7500 RPM on flats? is that the rule? Thank you |
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Post by geh3333 on Apr 28, 2015 12:14:02 GMT -5
You have enough room to go with 11.5 grams rollers. That should get you up around 7500 7700 RpmS . you have to stagger 12 and 11 grams weights. I only went for a 1/2 mil drive. I will take it to work on Thursday and see what are top RPM on long stretch and report back. Ideally I do not want to go over 7500 RPM on flats? is that the rule? Thank you You can run between 6500-7000 rpms all day . I'd run at 7500 while passing cars , but its not an rpm that you would want to cruise at all day. Even 8000 rpms is fine , as long as u don't stay at that range for long periods. TBA , Its nice to know the engine temps . this way you know your limits .if you are cruising at 7500 rpms and the temps are staying under 200 degrees. Your engine should hold up just fine . |
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Post by ital on Apr 28, 2015 13:34:59 GMT -5
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Post by geh3333 on Apr 28, 2015 13:46:23 GMT -5
Your good to go ! You are spot on with your assessment. The first part , the gauge was reading way too high . the tach is a great and pretty much necessary tool for these scoots . you need one to be able to precisely tune your carb and CVT.
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Post by scooter on Apr 28, 2015 15:26:30 GMT -5
geh3333, I took a video but I am not on wifi right now and I cannot upload it, but I will as soon as I can. Anyway Played with the settings and the best one was 1 spark per Revolution even though according to the instruction for 4 cycle one cylinder it should be 1 spark 2 revs but my scoot did not like that setting as it stated it was idling @ 4k rpm.. :-) went for a quick spin to check RPM and I am a bit disappointed that RPM seemed to be perfect... I was hoping to be able to lower roller weights a bit but I am not sure it is possible.... On take off I was just @7k RPM and then RPM would stay at around 6500 RPM all the way up to 55MPH and then peak about 7200 RPM at 60 MPH. I am on 12 Grams Rollers, wanted to try perhaps 11 Grams DR pulley sliders but I think I would reving to high... Opinions? those are not GPS speeds... so take that with a grain on salt.. MPH are a bit off. Thank you I think the GY6 sparks every revolution, even though the actual combustion only happens every other revolution. |
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Post by dmartin95 on Apr 28, 2015 15:52:29 GMT -5
geh3333, I took a video but I am not on wifi right now and I cannot upload it, but I will as soon as I can. Anyway Played with the settings and the best one was 1 spark per Revolution even though according to the instruction for 4 cycle one cylinder it should be 1 spark 2 revs but my scoot did not like that setting as it stated it was idling @ 4k rpm.. :-) went for a quick spin to check RPM and I am a bit disappointed that RPM seemed to be perfect... I was hoping to be able to lower roller weights a bit but I am not sure it is possible.... On take off I was just @7k RPM and then RPM would stay at around 6500 RPM all the way up to 55MPH and then peak about 7200 RPM at 60 MPH. I am on 12 Grams Rollers, wanted to try perhaps 11 Grams DR pulley sliders but I think I would reving to high... Opinions? those are not GPS speeds... so take that with a grain on salt.. MPH are a bit off. Thank you I think the GY6 sparks every revolution, even though the actual combustion only happens every other revolution. Yes, you're correct.... You have a pickup coil that goes over top of your flywheel, that flywheel has a big magnet on the top, everytime that passes the pickup, it fires,,,... However, It fires to the CDI... From there, the CDI only produces 1 pulse, per 2 revolutions.... That's why if you hook up a tachometer, you have to connect to your pulse signal coming out from your CDI and not the pickup coming in..... |
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Post by ital on Apr 28, 2015 15:56:33 GMT -5
I think the GY6 sparks every revolution, even though the actual combustion only happens every other revolution. Yes, you're correct.... You have a pickup coil that goes over top of your flywheel, that flywheel has a big magnet on the top, everytime that passes the pickup, it fires,,,... However, It fires to the CDI... From there, the CDI only produces 1 pules per RPM... That's why if you hook up a tachometer, you have to connect to your pulse signal coming out from your CDI and not the pickup coming in..... Do you think my reading correct now with the way I have it set up? |
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Post by scooter on Apr 28, 2015 16:28:11 GMT -5
I think the GY6 sparks every revolution, even though the actual combustion only happens every other revolution. Yes, you're correct.... You have a pickup coil that goes over top of your flywheel, that flywheel has a big magnet on the top, everytime that passes the pickup, it fires,,,... However, It fires to the CDI... From there, the CDI only produces 1 pules per RPM... That's why if you hook up a tachometer, you have to connect to your pulse signal coming out from your CDI and not the pickup coming in..... There was a discussion about it at scootdawg.proboards.com/thread/27047/gy6-sparks-revolutionThis was a rare event where Allyoop reversed his decision about 3/4 down the page. "Oct 26, 2009 at 12:07am Post Options Post by als01seville on Oct 26, 2009 at 12:07am Hi Troops, I stand corrected. You guys that said it fires twice on every revolution are correct. Guess you cannot believe every video showing how these motors work. I did some more research and and your correct Cruiser66 if the CY6 had a distributor it would fire on every forth stroke but it doesn't so it fires on every up stroke and one firing is wasted because its fireing on the exhaust stroke. Well it was a good science project and got to the real explanation of our 4 stroke engines. They do say the fireing on the exhaust stroke all it does it wear the plug out faster. Live and Learn and Not to Old to learn new stuff. Alleyoop " Read more: scootdawg.proboards.com/thread/27047/gy6-sparks-revolution#ixzz3YdqjvoiaOf course that was six years ago and I'm sure some scoots are different. |
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Post by scooter on Apr 28, 2015 16:31:53 GMT -5
Yes, you're correct.... You have a pickup coil that goes over top of your flywheel, that flywheel has a big magnet on the top, everytime that passes the pickup, it fires,,,... However, It fires to the CDI... From there, the CDI only produces 1 pules per RPM... That's why if you hook up a tachometer, you have to connect to your pulse signal coming out from your CDI and not the pickup coming in..... Do you think my reading correct now with the way I have it set up? If you are going full throttle and it says 7500-8,000 or so RPM then yes. You should be idling at around 1500-2000 or so RPM. |
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Post by dmartin95 on Apr 28, 2015 18:25:23 GMT -5
Yes, you're correct.... You have a pickup coil that goes over top of your flywheel, that flywheel has a big magnet on the top, everytime that passes the pickup, it fires,,,... However, It fires to the CDI... From there, the CDI only produces 1 pules per RPM... That's why if you hook up a tachometer, you have to connect to your pulse signal coming out from your CDI and not the pickup coming in..... Do you think my reading correct now with the way I have it set up? You never said how you hooked it up, but if your numbers are around 1500~2000 rpm idle and 7~8000 RPM at WOT I'd say yes... Those are the numbers you should be at. |
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Post by ital on Apr 28, 2015 19:51:39 GMT -5
Do you think my reading correct now with the way I have it set up? You never said how you hooked it up, but if your numbers are around 1500~2000 rpm idle and 7~8000 RPM at WOT I'd say yes... Those are the numbers you should be at. I wrapped the signal wire to the ignition coil next to the spark plug. Tx |
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Post by dmartin95 on Apr 28, 2015 21:05:16 GMT -5
It's correct then.
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Sophomore Rider
Currently Offline
Posts: 128
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Post by gingel on Apr 29, 2015 9:31:01 GMT -5
Hi, where did you buy this tachometer? It looks great.
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Post by ital on Apr 29, 2015 13:44:13 GMT -5
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