Clinician
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Post by trace on Oct 3, 2014 20:26:04 GMT -6
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Post by Bashan on Oct 3, 2014 21:29:45 GMT -6
I used the purple CDI and I think it helped some but it didn't change the bike dramatically. My opinion on spark is that the GY6 doesn't need a great deal of spark to ignite the relatively small amount of charge that is introduced into the combustion chamber but this is debated endlessly. Same with the iridium plug, it is wasted overkill. Go ahead people, skewer me, this is just my opinion. TVnACman sold me a variable timing CDI that DID seem to help performance and I'm not saying that because he's a friend of mine....it really did. I had a dealer once tell me the orange coil didn't do squat for performance but was a more reliable coil than the black ones. I would say this is true. I was asked to comment on the electrical package from BPNW and I would have to say it's kinda high end for those components and they really wouldn't improve the performance of your bike. Having said that Mike sells very nice stuff and I have bought from him many times. Rich
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Doc's Anything Goes
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Post by tvnacman on Oct 4, 2014 9:27:27 GMT -6
I think this is a better deal . John |
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Post by cyborg on Oct 4, 2014 9:56:23 GMT -6
The only thing i can see would be a quicker response to timing advance and a higher rev limit,,,should give you a little something more,,,to be honest the biggest bang for the buck in my opinion is a better carb jetted correctly with an airbox mod or a pod filter and a decent exhaust,,,the least amount of investment for the most return of more power
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Doc's Anything Goes
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Post by jct842 on Oct 4, 2014 11:39:15 GMT -6
The iridium plug might be better if you have an extremely weak spark but in a normal engine not worth it. They will foul out same as a regular plug if your running rich. I have used them in a gy6 and a majesty. When I bored the majesty I put the normal plug back in and its been running fine on that plug the last 5-6K or what ever the miles are since over haul.
I have never heard of a ign system for a gy6 that gave much improvement, a little but not night and day difference. But I have heard of preformance cdi that were actually worse.
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Clinician
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Post by trace on Oct 4, 2014 12:27:56 GMT -6
Thanks for the responses!
Here is the back story:
I bought this Super Hornet for my fiancee so she could take it on the highway for a short 15 minute ride to the commuter train and back for work. She likes how it looks and likes the CVT (no shifting in particular). It was advertised as going 70+ MPH. When it arrived, I took it out for a test ride. The speedo said I was going 75-80 MPH, but it did not seem like I was going that fast (I'm going to make a separate post for this issue). So I pulled off to the side of the road, installed a GPS app on my phone and topped her out again. I recorded 52 MPH top speed, and I weigh 250 lbs. I don't really feel comfortable having her go on the highway that slow. If I could get it up to at least 60 MPH I'd be okay with it.
My hypothesis is that if we can get higher RPMs out of it by using the CDI, the top speed would go up. Does anyone agree? This is my only goal...
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Doc's Anything Goes
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Post by tvnacman on Oct 4, 2014 12:28:47 GMT -6
The iridium plug might be better if you have an extremely weak spark but in a normal engine not worth it. They will foul out same as a regular plug if your running rich. I have used them in a gy6 and a majesty. When I bored the majesty I put the normal plug back in and its been running fine on that plug the last 5-6K or what ever the miles are since over haul. I have never heard of a ign system for a gy6 that gave much improvement, a little but not night and day difference. But I have heard of preformance cdi that were actually worse. I agree with you John !!! John |
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Clinician
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Post by trace on Oct 4, 2014 12:34:34 GMT -6
The iridium plug might be better if you have an extremely weak spark but in a normal engine not worth it. They will foul out same as a regular plug if your running rich. I have used them in a gy6 and a majesty. When I bored the majesty I put the normal plug back in and its been running fine on that plug the last 5-6K or what ever the miles are since over haul. I have never heard of a ign system for a gy6 that gave much improvement, a little but not night and day difference. But I have heard of preformance cdi that were actually worse. I agree with you John !!! John Okay. The plug is out... Thanks! Here's what I need advice for: I bought this Super Hornet for my fiancee so she could take it on the highway for a short 15 minute ride to the commuter train and back for work. She likes how it looks and likes the CVT (no shifting in particular). It was advertised as going 70+ MPH. When it arrived, I took it out for a test ride. The speedo said I was going 75-80 MPH, but it did not seem like I was going that fast (I'm going to make a separate post for this issue). So I pulled off to the side of the road, installed a GPS app on my phone and topped her out again. I recorded 52 MPH top speed, and I weigh 250 lbs. I don't really feel comfortable having her go on the highway that slow. If I could get it up to at least 60 MPH I'd be okay with it. My hypothesis is that if we can get higher RPMs out of it by using the CDI, the top speed would go up. Does anyone agree? This is my only goal... |
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Post by cyborg on Oct 4, 2014 12:40:18 GMT -6
i can see a marginal terminal speed increase with the cdi with a higher rev limit,,but it will be no ball of fire,,,and as a side note on flat ground weight does not affect terminal speed,,,just how quick you get there,,,i think a pipe and a rejetted stock carb would see more improvement than just a cdi alone,,,but a combo of all three would be the ticket for what you're after  |
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Post by cyborg on Oct 4, 2014 12:43:56 GMT -6
After my break in period of 1000 miles the pinasco carb (2mm larger than stock),,,jetted correctly,,,and pinasco pipe go on my scoot and i may or may not investigate a higher rev cdi
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Doc's Anything Goes
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Post by tvnacman on Oct 4, 2014 13:14:04 GMT -6
I would look into a larger diameter variator they are 115mm vs stock of 107mm . its the drive pulley on the crankshaft , maitain the same rpm at a taller gear ratio = higher top speed . We need to know if the engine is long or short case . What size wheels ? John |
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Doc's Anything Goes
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Post by jct842 on Oct 4, 2014 14:04:27 GMT -6
The variator will probably be the single most improvement you can get, larger dia along with the right weights for it. I don't think sliders will gain much except possibly a little acceleration advantage. I found a slightly longer belt also helps to get the belt to the top of the variator.
If that machine has a non standard case there will be a parts problem. Then there are changing the final gear ratio but again to run a higher gear you need more power.
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Post by Alleyoop on Oct 4, 2014 15:10:04 GMT -6
The 150s do not come with REV-LIMITED CDI's so you do not have to worry about that. If the rpms are not getting over 7K
the reason is the weights are to heavy and you need lighter weights.
Rollers for every gram up or down it will effect the RPMS by 500-600.
Sliders for every gram up or down it will effect the RPMS by 200-350.
So you now know which way you have to go with the weights if needing more or less RPMS.
Look on the side of the case by the side stand and the motor type will be itched into the case. I bet it is a 150cc 157QMJ or a 1P57QMJ motor and yes those stock will do just 50 and little over. So to get more top end speed you need to be running around 7500 rpms because that is where the motor makes it's most horsepower. You can get more top end speed by going to a 115mm variator the stock one is 107mm and weights that will get the rpms close to 7500 which would be anywhere from 11-13 gram weights.
After that you want little more top end then the biggest bang for the buck is putting in taller gears in the tranny they are cheap, the 150s usually come with 13/40 gears so you could go 15/38 2 up and 2 down without effecting the bottom end and it will get you 5 to 8 more mph on the top end.
Alleyoop
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Post by Bashan on Oct 4, 2014 15:51:38 GMT -6
To every new member.....ignore the Chinese speedometer! It is registering angstroms per hour or some other irrelevant unit. The GPS is the only way to judge your speed on these bikes. Actually, most of my bikes, regardless of make, had lousy speedos. There is no replacement for displacement. You want to go faster and not roast the engine, buy a 250. In lieu of that go with a combination of what the guys said. Improve your flow through the engine and a higher jet, and tweak the CVT. The ignition changes won't do a whole lot. Pete (Cyborg) is big on weight reduction and he is right, just a few pounds off of a bike make a big change I've noticed. It's surprising. Rich
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Post by trace on Oct 5, 2014 1:02:57 GMT -6
She weighs about 125... so it looks like this is the way to go... I've got to hit the hay but will dig deeper into this ASAP. Thanks all!
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..BAD TO THE BONE..