|
|
Post by ital on Apr 1, 2015 10:22:25 GMT -5
Hi All,
I have a 2012 Puma Valentine 150cc, she has about 3k miles on her so far and she has been very reliable for the most part. I've been doing all the maintenance work and in the summer I drive her almost everyday to work about 30 miles each way, about 50 minutes of mostly full throttle driving.
I want more speed out of here and i did most of the upgrades already getting her ready for the BBK, hoca variator, uni filter and exhaust. I wanted to know how reliable the NCY big bore kit is? I did some research and most people that do these upgrades post for the first year and then they go MIA and you do not know if the scooter just blew up or something.
anyone running this kit for many years without issues?
I plan to get the NCY 61MM big bore kit together with the gearing change.
They also have an NCY that is ceramic coated that I believe is 57.5MM which is a bolt on. I would like to go with the bigger one if i do not have to worry about reliability issues.
I still have the stock carburetor I am hoping I can hold off replacing it for now to keep the cost down. I would replace it probably next year to a 30MM one.
thank you - Luigi
|
|
|
|
Post by ramblinman on Apr 1, 2015 12:39:44 GMT -5
if i'm not mistaken geh3333 has ncy bbk along with many other mods reaching 67mph. i think he had to change the gears to get that speed. you might consider doing the gears first. i'd get some info from him or another member before you order any parts.
most problems with any bbk is caused by improper installation or running lean. imo as long as you properly install, rejet the carb and break the engine in then you shouldn't have any problems. oh, and don't forget oil changes/level.
|
|
|
|
Post by ital on Apr 2, 2015 10:40:27 GMT -5
if i'm not mistaken geh3333 has ncy bbk along with many other mods reaching 67mph. i think he had to change the gears to get that speed. you might consider doing the gears first. i'd get some info from him or another member before you order any parts. most problems with any bbk is caused by improper installation or running lean. imo as long as you properly install, rejet the carb and break the engine in then you shouldn't have any problems. oh, and don't forget oil changes/level. Thank you for the reply. I re-jetted pretty heavily after installing UNI filter. I went from a 105 main jet to a 130, that is when she ran best. I just installed an Exhaust and the 130 main Jet still feels fine. I may consider installing a high performance CDI but I am not sure if they will add any performance to a 150CC and can cause the engine to run hotter. I do not think it is worth it, but I could be under the wrong assumption\impression. Thank you |
|
|
|
Post by ital on Apr 2, 2015 14:48:08 GMT -5
Also one more question. If the scooter is running fine now with a 130 main jet, will I need to jet higher after installing big bore kit? I read many places where people had to down jet due to the increase vacum able to pull in more fuel. Do you think my stock 24mm carb can handle it? And if I were to put on a 30MM carb would that increase power?
Thank you
|
|
|
|
Post by geh3333 on Apr 2, 2015 18:07:11 GMT -5
How's it going , ncy is a very reliable brand. You should not have to go any higher than a 130 main jet , and yes I would go with either a 28 or a 30mm carb. Many have had noticeable increases in performance with the bigger carb . the higher the bore the hotter your engine will run . they make an oil cooler for the bigger bore sizes . when you get up to 61mm your right about that area were you may want to look into the oil cooler. I only went with a 58.5mm kit and I can reach a top speed of 67mph on a straight run , I have to lean forward out of the wind to hit that speed lol , without crouching over she'll hit around 64mph . do you have a stock head ? I went with an ncy 58.5 racing head , it has bigger intake and exhaust ports which helps with the air flow through the engine. They also make a 60mm kit . if you want the 61mm kit , go for it . I would buy a temp gauge just so you know what your temps are, that's one way some destroy their engines , most of these scoots have no temp gauges so they have no clue what they are running g at and the next thing you know the engine is toast.
|
|
|
|
Post by ital on Apr 5, 2015 21:52:10 GMT -5
Thank you all for the great feed back. Can I bolt the ncy 61mm straight up without changing anything else other then rejetting, uni filter and exhaust. I was speaking with my local scooter shop and he was saying i would need heads too. Thanks
|
|
|
|
Post by lain on Apr 5, 2015 22:48:28 GMT -5
if i'm not mistaken geh3333 has ncy bbk along with many other mods reaching 67mph. i think he had to change the gears to get that speed. you might consider doing the gears first. i'd get some info from him or another member before you order any parts. most problems with any bbk is caused by improper installation or running lean. imo as long as you properly install, rejet the carb and break the engine in then you shouldn't have any problems. oh, and don't forget oil changes/level. Thank you for the reply. I re-jetted pretty heavily after installing UNI filter. I went from a 105 main jet to a 130, that is when she ran best. I just installed an Exhaust and the 130 main Jet still feels fine. I may consider installing a high performance CDI but I am not sure if they will add any performance to a 150CC and can cause the engine to run hotter. I do not think it is worth it, but I could be under the wrong assumption\impression. Thank you Never heard of performance CDI's causing higher heat levels, my engine actually runs cooler with the Casoli performance CDI. |
|
|
|
Post by ital on Apr 5, 2015 23:54:55 GMT -5
Sweet!! That is good news. My local scoot shop carries the Casoli CDI and will try it out. Did it make a noticeable difference for you?
|
|
|
|
Post by geh3333 on Apr 6, 2015 15:46:07 GMT -5
In my opinion the head and cam is more important then the bbk. Without a ported or a bigger quality head and a better cam , you will never get the performance you are expecting from installing a bbk. On the other hand , with out a bbk you can still get much more out of you scoot from only changing the air and fuel flow through the engine. The head assembly " ports , valves and cam " is what allows more air and fuel to enter the chamber to be burned. Without this upgrade , your scoot will always be lacking.
|
|
|
|
Post by JerryScript on Apr 6, 2015 18:58:32 GMT -5
In my opinion the head and cam is more important then the bbk. Without a ported or a bigger quality head and a better cam , you will never get the performance you are expecting from installing a bbk. On the other hand , with out a bbk you can still get much more out of you scoot from only changing the air and fuel flow through the engine. The head assembly " ports , valves and cam " is what allows more air and fuel to enter the chamber to be burned. Without this upgrade , your scoot will always be lacking. There is no replacement for displacement! |
|
|
|
Post by ital on Apr 6, 2015 20:44:00 GMT -5
I am going on vacation but when I get back if I get confirmation that I can use the stock head with the NCY 61 mm big bore kit I am pulling the trigger together with some ncy 16 × 38 or 15 x 38 gearing. Did all the research and I think I should be able to do all the work  I am thinking 70mph will be achievable on flats... Will keep stock carb for now... Thanks |
|
|
|
Post by geh3333 on Apr 6, 2015 23:32:55 GMT -5
In my opinion the head and cam is more important then the bbk. Without a ported or a bigger quality head and a better cam , you will never get the performance you are expecting from installing a bbk. On the other hand , with out a bbk you can still get much more out of you scoot from only changing the air and fuel flow through the engine. The head assembly " ports , valves and cam " is what allows more air and fuel to enter the chamber to be burned. Without this upgrade , your scoot will always be lacking. There is no replacement for displacement! The problem is when we are talking about 4mm of bore over a stock 150cc Horse power can easily overcome that amount of displacement. A 61mm kit without the high performance mods such as exhaust and intake will not give you much , but add the extra fuel and air flow and your in business. There is no reason a stock bore can not reach the 60-65 mph range with the right head , and air flow upgrades , but try the 61mm kit with out those upgrades and you will never reach those speeds. I agree after you increased the air and fuel flow , along with a quality head , then there is no replacement for displacement. Unless we are talking about going from a stock 50cc to a 150cc or from a 150cc to a 250cc then I agree all the way . but a 4mm increase will not overcome a good increase in Horse power by increasing air and fuel flow. Now both together are unbeatable. |
|
|
|
Post by geh3333 on Apr 6, 2015 23:39:23 GMT -5
There is no replacement for displacement! The problem is when we are talking about 4mm of bore over a stock 150cc Horse power can easily overcome that amount of displacement. A 61mm kit without the high performance mods such as exhaust and intake will not give you much , but add the extra fuel and air flow and your in business. There is no reason a stock bore can not reach the 60-65 mph range with the right head , and air flow upgrades , but try the 61mm kit with out those upgrades and you will never reach those speeds. I agree after you increased the air and fuel flow , along with a quality head , then there is no replacement for displacement. Unless we are talking about going from a stock 50cc to a 150cc or from a 150cc to a 250cc then I agree all the way . but a 4mm increase will not overcome a good increase in Horse power by increasing air and fuel flow. Now both together are unbeatable. For example I only went up to a 58.5 bore and with all the other mods I can hit speeds many with a 61mm cannot . now is that because of the 58.5 bbk ? I don't think so . its mainly due to the increase in air and fuel flow . |
|
|
|
Post by lain on Apr 7, 2015 5:37:01 GMT -5
The problem is when we are talking about 4mm of bore over a stock 150cc Horse power can easily overcome that amount of displacement. A 61mm kit without the high performance mods such as exhaust and intake will not give you much , but add the extra fuel and air flow and your in business. There is no reason a stock bore can not reach the 60-65 mph range with the right head , and air flow upgrades , but try the 61mm kit with out those upgrades and you will never reach those speeds. I agree after you increased the air and fuel flow , along with a quality head , then there is no replacement for displacement. Unless we are talking about going from a stock 50cc to a 150cc or from a 150cc to a 250cc then I agree all the way . but a 4mm increase will not overcome a good increase in Horse power by increasing air and fuel flow. Now both together are unbeatable. For example I only went up to a 58.5 bore and with all the other mods I can hit speeds many with a 61mm cannot . now is that because of the 58.5 bbk ? I don't think so . its mainly due to the increase in air and fuel flow . What about the transmission upgrades, like the variator and clutch, don't those contribute to top speeds and reaching them? |
|
|
|
Post by jerseyboy on Apr 7, 2015 7:11:17 GMT -5
Geh is 100% correct on this,,a 150 with a BBK will not see much increase in power unless you upgrade air fuel delivery and better flow using higher lift cam, big port heads,UNI,free flow exhaust. My stock 150 with UNI,up jet,and free flow exhaust ran better than a scooter with just a BBK and no extra parts added for free flow and fuel.There is no replacement for displacement thats true,,but if you dont have the added air/fuel and flow its not worth doing a BBK IMO...and there is no better mod than a pipe and upjet for any motor.My stock 150 with pipe and jet kit would easily do 60 mph.Now with the gears and BBK Im hoping to maybe see 70. My Taiwan BBK is starting to really wake up good now with about 100 miles on it,,just a little twist of the throttle and she is doing 50 MPH no sweat,,i cant wait to see top speed in a few weeks on GPS,,i will keep you guys and girls posted. Tom from Jersey |
|
