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Post by xyshannen on Mar 23, 2015 23:12:44 GMT -5
Just curious, how do you know the new carb has larger jets? Pretty much all stock 24mm carbs (stock carb size for 150cc gy6) have the same size jets, and I've honestly never seen any carb for sale that had the jet sizes listed. Nor have I ever seen a carb listed that says "now with bigger jets". Not to say finding one listed like that is impossible, just would like to know where you found it. Also out of the 3 carbs I have bought none of them had what size the jet was listed on the jet or anywhere on the packaging material. When you buy aftermarket jets they all have or should have what size they are stamped on the jet.
You can get a set of 10 jets from parts for scooters.com for less than 20 bucks shipped. A lot faster and a lot cheaper than just buying a new carb. Furthermore, if you are going to be modding your motor you really need a set of jets so you can adjust your tune right. Just because you are getting a carb "with bigger jets" still does't mean they will be the right size for your application.
Right now your motor is running like crap due to it being lean, and lean is very bad for these motors. It causes them to over heat. If you don't fix it and like immediately you risk destroying your motor. It really doesn't take much at all. In cold weather you might get away with a few miles before you start to damage your engine. The double edge sword is your motor needs to be tuned richer for riding in the cold so the colder it is the leaner your stock carb is going to run.
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Post by xyshannen on Mar 2, 2015 23:33:57 GMT -5
I don't ride in the rain so water/road grime isn't an issue. I also park inside a shop. Now the shop does have open windows near the roof line so pollen is an issue. I wipe her down when ever she starts looking a lil yellow. Now I'm a compete nutjob about how it runs. Since my scoot is very sensitive to temp changes, I tune the air/fuel and RPM at east once a day...and thanks to Florida's crazy weather it can be 50f in the morning but by noon t's in the upper 70s causing me to tune it several times a day. Now if, I'm not going anywhere one day I won't touch it.
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Post by xyshannen on Mar 2, 2015 9:42:35 GMT -5
The problem with a seat like that is in the event of an accident (knock on wood) it makes it difficult to bail off of the scooter.
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Post by xyshannen on Feb 22, 2015 22:53:32 GMT -5
LOL I know better. We're aight man.  See here's how my head works.. You call me an exhaust sniffer and I instantly think of worse things that I've sniffed.  |
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Post by xyshannen on Feb 21, 2015 22:40:55 GMT -5
I bet I could squeeze out an extra HP or 2 just by wearing that stuff wile riding my scoot. |
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Post by xyshannen on Feb 21, 2015 20:14:04 GMT -5
The thing thats sucks about this is, wile yes a typical 150cc motor puts out some serious pollutants, when you do the math @ 60+ MPG we are still way under the bar when compared to a 12-17mpg SUV. And wile yes you can haul way more in that SUV, statistics still show that  % of all driving is done in a single occupancy method. |
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Post by xyshannen on Feb 21, 2015 20:00:27 GMT -5
OMG I could so go all over the place with that comment, but for fear of banishment I won't go there.
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Post by xyshannen on Feb 21, 2015 19:57:03 GMT -5
I think you guys need to lighten up a tad. The guy has already made one of the biggest mistakes one can make when rebuilding an engine. It's a lesson he probably will never have to be taught again. At least now he is here and in the future can ask us questions when he isn't sure about something. Seriously guys, these little motors are so simple a well trained monkey can work on them...Just look at all Geh has accomplished.  |
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Post by xyshannen on Feb 21, 2015 19:40:01 GMT -5
jerseyboy Same here. My pops was a pro drag racer until his early 30s, so growing up we were always tinkering with motors of some sort or another. He had to get on to me more times than I can remember for sniffing the gas. My first exp with a top fuel dragster was getting to closes to it when they fired it of with the nitro methane. I was literally touching the rear tire. At first I thought it was funny that all the crew put on gas masks. I soon found out why after they fired it off. Holy crapsickle that stuff is TOXIC! Lit both my eyes and lungs on fire. I was expecting something like the smell of CAM2 race fuel (another of my fav smells)..Boy was I ever wrong. That was a lesson you only have to learn once. With exp you can get a really good idea of how a motor is running (lean/rich) by the exhaust. I never check my plugs. I instead smell the exhaust at idle and at cruising RPMs.
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Post by xyshannen on Feb 21, 2015 13:48:57 GMT -5
I used to have a 49cc with BBK, did not make a lot of difference at first, but what really opened up the engine was an A9 cam, was only around $30 and think I bought from that same seller. I played with jets, air filters and I dropped down to 5g rollers which took advantage of the higher power band on the cam, took months to get a good tune on that scoot. Ultimately it was just not quite enough power so I went 150cc.yup, there's no replacement for displacement. |
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Post by xyshannen on Feb 21, 2015 13:36:01 GMT -5
Instead of going through all this trouble to "modify" your variator, why not just buy one that works right to begin with, I mean it's not like these things are expensive.
My 115mm Hoca variator I got from partsforscooters.com work great. The belt uses the entire face of the variator.
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Post by xyshannen on Feb 21, 2015 13:32:19 GMT -5
If you torque the head bolts to the proper specs, it shouldn't need any silicone sealant at all.
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Post by xyshannen on Feb 21, 2015 13:29:32 GMT -5
jerseyboy LOL yeah I like that small almost as much as I like the smell of gas and exhaust.
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Post by xyshannen on Feb 21, 2015 12:29:27 GMT -5
geh3333 I will buy the old ones from him just so I can use them as air fresheners in my truck,,love that HF Chinese rubber smell,,smells like new scooter,parts,and tools to me...am I the only one..lol I love that smell at HF also. |
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Post by xyshannen on Feb 19, 2015 21:54:37 GMT -5
I'm pretty sure your problem with the engine stems from it running lean. Going to an advanced timing CDI alone in some cases can require an up jet in the carb. Add a BBK to the mix and yeah you were definitely running lean. The oil may have played it's part as well. No your client doesn't need to check his oil every day. The first oil change should be made after the initial break in period (about 50 or so miles). This first oil change is pretty critical as your oil will be full of all kinds of metal shavings and particulates too small too see. Remember these engines don't really have an oi filter. If the engine runs too long with with the initial break in oil you can cause serious damage.
As for break in methods.....well there really isn't one best way. The main idea is to let the engine run but not at one steady RPM for too long and to keep WOT down to a minimum. Most do break their engines in by actually riding their scoots. But I like to do an on-the-stand type of break in and for you this may be your best bet. Doing this before handing over the new scoot to a customer who may or my not have a clue about the workings of an ICE will help save you a ton of headache and doesn't really cost you much but time.
Put the scooter up on it's center stand, point a fan at the engine cooling fan and start the scoot. Let it run until the enricher on the carb turns off and your RPMS settle down. Then adjust the idle screw to turn the idle up to 3k-3500. Now just sit there and let it run. In a few minutes you should hear the RPMs increasing as the rings on the piston seat to the cylinder jug. once the RPMS stop going up, readjust the idle back down to about 3k. Then over the course of an hour sit with it wile it runs..from time to time blip the throttle to bring the RPMS up to about 55k. After this hour long break in, the engine is pretty much good to go. Just make sure to change the oil before handing the scoot back. They still don't want to run it WOT for more than short bursts, but after a couple hundred miles they should have zero breakin issues.
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% of all driving is done in a single occupancy method.
