|
Post by michaeljackson on Feb 11, 2013 0:45:12 GMT -5
I have no choice but to ride it. And what will up jetting the carb do?. Also what size jet am i looking for. Can this be ordered on ebay?.
|
|
|
Post by millsc on Feb 11, 2013 0:45:14 GMT -5
try some 5 or 6 gram dr pulley slider weights and get rid of the airbox and upjet.
|
|
|
Post by millsc on Feb 11, 2013 0:45:50 GMT -5
Your gonna have no scoot if you ride it with stock jet in it.
|
|
|
Post by michaeljackson on Feb 11, 2013 0:53:18 GMT -5
This is my only means of transportation. I have already ridden it?. is it in the process of breaking?. Could I atleast ride it to a repair shop?. Please explain why you can't do this?. What will happen. thanks.
|
|
|
Post by michaeljackson on Feb 11, 2013 0:55:02 GMT -5
could it ruin the valves?. And crap.. my back pipe cracked real recently and is being held on by the screws..
|
|
|
Post by michaeljackson on Feb 11, 2013 0:58:07 GMT -5
Also how do i up jet?. Is it just the main jet?. Do I buy new jets on ebay?. or use a drill?? Sorry...
|
|
|
Post by OverReved on Feb 11, 2013 3:42:46 GMT -5
Wow man.. everyone slooooow down and chill out. Michael. Running an engine with too small jetting will cause it to run lean: running an engine lean makes the combustion super efficient but the problem is super efficient combustion makes a LOT of heat in a very short period of time. This heat causes concentrated hot spots. This heat is all built up mainly inside the engine and not radiated as well from the exhaust system. The biggest danger is overheating the top of the piston, causing it to swell and making the rings tight, they could become tight enough to stick in the bore and break or even rip the top of your piston off when it sticks, another danger is an overheated exhaust valve.. Not good since it can melt. So with that said.. evaluate what jetting you have in that carburetor and based on some searches on the board, or asking questions, determine what size jetting you should install. I'd not suggest using a drill. You should buy the proper size off a scooter store or some other location. If you take it to the repair shop be prepared to tell them what size jet you want.. You need to change the main jet.
|
|
|
Post by michaeljackson on Feb 11, 2013 9:52:27 GMT -5
Ive been reading contradictory reports that heavier weights insecure top end not lighter weights. And that would make sense sense I think sense the ratio is more turned for speed that way a bike would be changing from a low gear to a high gear.. Right?.
|
|
|
Post by prodigit on Feb 11, 2013 10:04:00 GMT -5
my 2ct: The engine on the tao is rev limited. Meaning, if your stock engine does 7k RPM to go to 40MPH, your BBK will go 40 at the same 7k RPM. The only thing you can do (aside from what was mentioned before and get bigger jets), is to upgear your bike.
|
|
|
Post by super9 on Feb 11, 2013 10:04:12 GMT -5
are you still using the stock exhaust? and yours is a 4t right? ( 4 stroke ) and i agree with millsc you have to spend loads to get the speeds you want
|
|
|
Post by michaeljackson on Feb 11, 2013 10:20:36 GMT -5
I had hoped the CDI would get rid of the rev limit. And by upgrades you mean buy a better bike?.
|
|
|
Post by super9 on Feb 11, 2013 10:23:34 GMT -5
you can get a new cdi im not sure if yours is limited tho via the cdi..ive also heard/read that you have to be carefull with the stock crank if you go over a certain amount of revs but millsc will know more about that
|
|
|
Post by michaeljackson on Feb 11, 2013 10:25:56 GMT -5
Yeah it's a 4t and I'm using a stock exhausted that cracked... so it sounds alot louder.
|
|
|
Post by prodigit on Feb 11, 2013 10:29:50 GMT -5
As long as the crack is not on the engine size (in the pipe), you're good to go. If you like loud, you can actually remove the end piece of the muffler without any bad consequences (except for perhaps have rain fall in it..
The most important part of a muffler is a tuned to size straight pipe coming out of the engine, which helps improve MPG. Sound reduction of the muffler will not significantly reduce performance, but it does somewhat.
|
|
|
Post by prodigit on Feb 11, 2013 10:36:37 GMT -5
Ive been reading contradictory reports that heavier weights insecure top end not lighter weights. And that would make sense sense I think sense the ratio is more turned for speed that way a bike would be changing from a low gear to a high gear.. Right?. More than likely you need to go with heavier weights, but that won't account for a lot of speed increase, only some. At best, 5MPH, unless the current rollers are way too light, and the cvt never maxes out. On some scoots, that do 7k rpm, at top speed their RPMs lower to 5 or 6k. Lighter rollers sometimes allow them to remain at higher RPMs, resulting in more output power, but also lower MPG and engine life.
|
|
|
Post by millsc on Feb 11, 2013 11:18:14 GMT -5
The crack in the exhaust will make it run even leaner upjet the carb before the scoot is toast
|
|
|
Post by skuttadawg on Feb 11, 2013 11:39:25 GMT -5
If your engine is screaming go with heavier weights . If it is slow try a lighter weight .
You can always get an ACME jetpack
|
|
|
Post by skuttadawg on Feb 11, 2013 11:52:16 GMT -5
Are you sure you even have a BBK installed ?
|
|
|
Post by super9 on Feb 11, 2013 12:14:10 GMT -5
Are you sure you even have a BBK installed ? just what i was thinking ur atleast see some speed increase
|
|
|
Post by super9 on Feb 11, 2013 12:18:27 GMT -5
just another thing have you changed your belt? that helps incerase speed..if the one you have installed now is old and thin
|
|
|
Post by inuyasha on Feb 11, 2013 12:42:29 GMT -5
Hi Its many different things that all have to work in concert to achieve more performance Installing a BBK is only going to increase your low end torque, to get more top end speed your going to have play around or replace your roller weights clutch, variator, torque and clutch springs, main gearing ETC My 95cc Red streak can hit 55 mph at 8,500 rpms Project scoot 045 by inuyasha50, on Flickr These are the mods that made that possible Hoca 44 mm stroker crank,NYC A9 performance cam, Dr pulley clutch , variator and 8.5 gram sliders 1,500 rpm clutch and torque springs . racing cdi, gears are 17/49 with a NYC 85 cc bbk and 50 mm head ported polished and milled to raise compression. With an Dellorto 20 mm carburator with 88 main jet and an after market exhaust. Take care and ride safely Yours Hank
|
|
|
Post by owlkev on Feb 11, 2013 13:20:57 GMT -5
i went up from a 78 stock to a 92 main jet on my 49qt12 47mm bbk install and down from a 7.5g to 4.5g rollers before i really saw any difference without it leaning out...you just got to experiment it took me ages,but you will get it
|
|
|
Post by prodigit on Feb 11, 2013 16:31:13 GMT -5
Wooh! Super spam!
|
|
|
Post by michaeljackson on Feb 11, 2013 17:58:09 GMT -5
The crack in the exhaust will make it run even leaner upjet the carb before the scoot is toast it will burn leaner but I think the engien it self wont be as hot. Either way I need to rejet. Found a 85 jet carb today. Hope that's good enough.
|
|
|
Post by super9 on Feb 11, 2013 19:01:08 GMT -5
85 is better than stock but if it was me id go bigger to be on the safe side remember to do plug chops
|
|
|
Post by michaeljackson on Feb 12, 2013 2:35:50 GMT -5
What is a plug chop ?
|
|
|
Post by super9 on Feb 12, 2013 8:47:54 GMT -5
|
|
|
Post by prodigit on Feb 13, 2013 14:39:15 GMT -5
Please use this site for the wealth of knowledge it provides. I hate to be that guy but, USE the tools available to learn what your doing. The Google search at the bottom of this page only brings up results from this forum. A 50cc can only do so much.... Your NOT gonna be crusing at 50mph withoout a bigger bike. You always have a choice to ride it or not. Maybe a bicycle or public transportation may better suite you. You can buy a bigger bike but, you are in no way limited or forced to ride it. I gotta call BS with MR MJ here. I top out at 55MPH with my 50cc!, That is, on a good day. Hank too from what I heard, but he has fuel injection. Granted, I live in Hot S-florida, and have mainly level ground, and it takes a good 20 minutes before the engine is hot enough to have these performance gains, and even then, it takes a good minute or so to get to 55, but I did 55, one time even peaked at 60MPH, when a large pickup truck passed me by and was cutting all the wind, on the highway. A 75cc engine is good enough to go 50MPH. Just get the right gearing, rollers, tire pressure, and fuel.
|
|
|
Post by inuyasha on Feb 13, 2013 19:00:55 GMT -5
Please use this site for the wealth of knowledge it provides. I hate to be that guy but, USE the tools available to learn what your doing. The Google search at the bottom of this page only brings up results from this forum. A 50cc can only do so much.... Your NOT gonna be crusing at 50mph withoout a bigger bike. You always have a choice to ride it or not. Maybe a bicycle or public transportation may better suite you. You can buy a bigger bike but, you are in no way limited or forced to ride it. I gotta call BS with MR MJ here. I top out at 55MPH with my 50cc!, That is, on a good day. Hank too from what I heard, but he has fuel injection. Granted, I live in Hot S-florida, and have mainly level ground, and it takes a good 20 minutes before the engine is hot enough to have these performance gains, and even then, it takes a good minute or so to get to 55, but I did 55, one time even peaked at 60MPH, when a large pickup truck passed me by and was cutting all the wind, on the highway. A 75cc engine is good enough to go 50MPH. Just get the right gearing, rollers, tire pressure, and fuel. Hi Shes even faster then that my friend "April" my Aprilia SR 50 R factory is an amazing 2t 50 cc scoot In stock form she has hit an all time high of 63 mph at 11,000 rpms Sr 50 top speed by inuyasha50, on Flickr I have derestricted her and reflashed the ECU but beyond that shes totally stock Take care and ride safely dear friend Yours Hank
|
|
|
Post by prodigit on Feb 13, 2013 20:44:23 GMT -5
Ow, that's unfair Hank, I thought it was a 4stroke ;-)
|
|