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by: rcq92130 - Jul 31, 2014 18:35:26 GMT -5
Post by rcq92130 on Jul 31, 2014 18:35:26 GMT -5
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by: pmatulew - Jul 31, 2014 20:31:54 GMT -5
Post by pmatulew on Jul 31, 2014 20:31:54 GMT -5
Well, the engineers did size the opening correctly...for a 150...that's meant to last for a given number of miles. Hopping it up shortens the lifespan considerably.
The Dr. P variator may have (what they consider) optimized ramp angles, internally and externally, that work harmoniously with the shape of the Dr. P sliders. I don't have either variator so I can't say for sure.
I do have a set of 12g Dr. P sliders and I will testify that they are made with better materials than the generic variety. They are both harder and slippery-er than the plain orange ones. Immediately obvious difference in overall behavior. Definitely recommendable.
No need for a longer belt. A little more diameter at the front will just pull the rear a little tighter. All good.
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by: geh3333 - Aug 2, 2014 0:57:52 GMT -5
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Post by geh3333 on Aug 2, 2014 0:57:52 GMT -5
Listen to me , I have a 58.5 bbk with the other mods below and I use a 32mm pumper carb with a 125 main jet . I wouldn't recommend a 30 or 32 mm carb unless u upgrade the head . But if u can match the airflow needed for that much fuel you will notice a nice increase . A 30 or 32mm carb will allow for more airflow which will then allow for more fuel without running to rich . Many motorcyclists modify their bikes by keeping bore size stock with head modifications , exhaust , filter and a bigger carb and jet to allow more fuel and air to pass into the head . Now that said , there is only so much air and fuel u can fit into the camber and I doubt anyone here has done the calculations to determine what the amount is . Don't be discouraged from using a 30mm carb , Trust this from someone who has been using a 32mm carb for almost 3 yrs with great results .
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by: rcq92130 - Aug 2, 2014 11:57:13 GMT -5
Post by rcq92130 on Aug 2, 2014 11:57:13 GMT -5
67 mph??? !!!!!
THAT I would like !!!!!!!!!!!
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by: rockynv - Aug 3, 2014 6:38:20 GMT -5
Post by rockynv on Aug 3, 2014 6:38:20 GMT -5
You can get 65 without the big bore kit using the Hoca Variator with the matching drive face and 12 gram rollers. You fuel system including the vacuum petcock or fuel pump needs to be in good order and your valves correctly adjusted along with having a good spark. One of the biggest holdbacks to getting a reliable 65 is fuel delivery with many not getting there because the fuel can't flow into the stock carb fast enough to keep up with the demand. Windshields can also be a big obstacle to getting more speed as the old police style barn doors add a lot of wind resistance to your bike and can slow you down as can half and open face helmets.
I did up my 2007 Lance Vintage 150 with the Scrappy Orange coil with matching DC CDI from Scrappy Dog and the Hoca Teflon coated variator with matching drive face along with the 12 gram rollers and Gates Power Link belt from Parts for Scooters and on flat ground and moderate inclines could run at 65+ without fuel starvation issues however valves had to be kept adjusted properly and the fuel system had to be kept clean and regularly treated. There were no other mods to the bike.
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by: geh3333 - Aug 3, 2014 19:02:31 GMT -5
via mobile
Post by geh3333 on Aug 3, 2014 19:02:31 GMT -5
You can get 65 without the big bore kit using the Hoca Variator with the matching drive face and 12 gram rollers. You fuel system including the vacuum petcock or fuel pump needs to be in good order and your valves correctly adjusted along with having a good spark. One of the biggest holdbacks to getting a reliable 65 is fuel delivery with many not getting there because the fuel can't flow into the stock carb fast enough to keep up with the demand. Windshields can also be a big obstacle to getting more speed as the old police style barn doors add a lot of wind resistance to your bike and can slow you down as can half and open face helmets. I did up my 2007 Lance Vintage 150 with the Scrappy Orange coil with matching DC CDI from Scrappy Dog and the Hoca Teflon coated variator with matching drive face along with the 12 gram rollers and Gates Power Link belt from Parts for Scooters and on flat ground and moderate inclines could run at 65+ without fuel starvation issues however valves had to be kept adjusted properly and the fuel system had to be kept clean and regularly treated. There were no other mods to the bike. Finally someone else who atleast some what agrees . I went from between 80 and  mpg to around 60 mpg . The trick is running as much fuel possible without running to rich . If it were me I'd still want a bigger and better quality head . I do agree also with the fuel delivery system being part of the problem . If you have the gravity feed fuel delivery system u will want to remove the terrible vacuum valve and add a 1/4 inch manual shutoff valve and all new 1/4 inch lines , you'll have mch better fuel delivery . |
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by: rockynv - Aug 4, 2014 7:13:46 GMT -5
Post by rockynv on Aug 4, 2014 7:13:46 GMT -5
The stock head was garbage and the valve seats were constantly sinking into the head until I started to use higher grades of fuel. Going to premium helped mostly reduce the frequency of having to do valve adjustments. The Lance had a 1.2 gallon fuel tank under the floorboards so I was filling it 3 times a week to commute to work and treating every other week with Berrymans fuel system cleaner to keep the pump at peak efficiency.
Running the correct amount of fuel reduces engine heat and can increase fuel efficiency.
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by: alleyoop - Aug 4, 2014 11:21:03 GMT -5
Post by alleyoop on Aug 4, 2014 11:21:03 GMT -5
The usual hype when they say performance variator is that most are good low to mid-range but fall short on the top end.
Dr. Pulley is good for low and mid-range but falls short on the top end. The best I have found for very good top end is the Prodigy Variator and will move the belt up to 1/8 from the edge that is quite a bit from the OEM.
Alleyoop
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by: rcq92130 - Aug 4, 2014 12:32:51 GMT -5
Post by rcq92130 on Aug 4, 2014 12:32:51 GMT -5
DAMN! Not 10 minutes ago I ordered a Dr Pulley variator kit. Wish I had seen this first.
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by: alleyoop - Aug 4, 2014 14:15:59 GMT -5
Post by alleyoop on Aug 4, 2014 14:15:59 GMT -5
Here is the PRODIGY on my motor and that is before the build that is with a stock motor. Notice the markings about 1/8 from the edge and that is a 115mm variator the OEMs are 107mm in diameter. Alleyoop  |
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by: geh3333 - Aug 4, 2014 14:59:47 GMT -5
via mobile
Post by geh3333 on Aug 4, 2014 14:59:47 GMT -5
You can get the same results with a Koso variator , they are cheap but they do work very good .
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by: rcq92130 - Aug 4, 2014 21:14:19 GMT -5
Post by rcq92130 on Aug 4, 2014 21:14:19 GMT -5
Variator on the way. Tips about taking the OEM one off (I do NOT have an impact wrench)? Any easy ways to hold the thing so the nut can be loostened?
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by: geh3333 - Aug 4, 2014 22:42:01 GMT -5
via mobile
Post by geh3333 on Aug 4, 2014 22:42:01 GMT -5
If you don't have one you need to either buy one or borrow one , it's very hard to hold the variator in place and get enough torque on the nut to break it loose . Many end up breaking the fins on the drive face trying to remove it without an impact .
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MC-74-150cc
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by: poppabear - Aug 5, 2014 19:13:16 GMT -5
Post by poppabear on Aug 5, 2014 19:13:16 GMT -5
With A 115mm variator and 12 g rollers what would you expect to get on the top end?  |
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by: alleyoop - Aug 5, 2014 21:36:29 GMT -5
Post by alleyoop on Aug 5, 2014 21:36:29 GMT -5
With A 115mm variator and 12 g rollers what would you expect to get on the top end? All depends on the Rpms, Weights and Size of the Rear Wheel, it is not a given speed. Just because you have a 115mm variator does not mean you will gain top end. You have to experiment with the weights to get the belt to climb as high as possible with good rpms. Alleyoop |
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mpg to around 60 mpg . The trick is running as much fuel possible without running to rich . If it were me I'd still want a bigger and better quality head . I do agree also with the fuel delivery system being part of the problem . If you have the gravity feed fuel delivery system u will want to remove the terrible vacuum valve and add a 1/4 inch manual shutoff valve and all new 1/4 inch lines , you'll have mch better fuel delivery .
..BAD TO THE BONE..
