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Post by blarboose on Jul 4, 2014 21:12:03 GMT -5
Im sure there's probably already a sticky or something for this, but I couldnt find one, so I figured Id just ask. Basically, Im looking to get a higher top speed out of my bike. Its a 2005 Tank tk150t-7, which I believe is also called the Racer 150. As it is now, I get a top speed of approximately 50MPH on a completely flat surface, with just me. Even a teeny tiny bit of an incline and I cant get more than 40 or 45MPH. Furthermore, adding just 25(ish) pounds of weight (in the form of a half dozen bottles of soda in the trunk and in my backpack) and my top speed drops down to 40MPH on a totally flat surface. Ive run seafoam in the gas tank several times, Ive cleaned the Carb, Ive replaced the air filter, fuel filter, fuel pump, and spark plug, and its got fresh oil. Im currently using 89 octane gas, but earlier today I filled up with  octane, but didnt notice any difference. What can I do, generally speaking, to get better top speed? Also, a related question; is there anything I can do to not end up with a lower top speed when I add weight? I eventually want to be able to ride while carrying a passenger, but if adding 25-ish pounds drops my top speed from 50 to 40, I cant imagine what adding a 150+ pound passenger will do. |
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Post by alleyoop on Jul 4, 2014 21:48:10 GMT -5
To move weight you need power, no magic there. So if you need to move more weight you need to have the motor make more power. That envolves getting more displacement slapping in a Big Bore Kit, bigger piston will take more air and fuel and make more power.
Now the way it sits you can get a few more mph out of it by tuning the CVT, a 115mm Variator to replace the 107mm stock variator, and then experiment with the weights. Normally the 150s run the best with 11-13 gram weights that allows the motor to rich it's max rpm which for a 150 is around 7500 rpms and where it produces the highest HP.
Alleyoop
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Post by jerseyboy on Jul 4, 2014 21:51:46 GMT -5
Yes,, Do a free flow exhaust,UNI POD filter,up jet carb,that will get you alot more efficient...you can also get taller gears but you need the power to push them,,so you could even get a 60mm BBK with A9 cam and big port head,,that along with taller gears like 16/37 will get you a higher cruising speed with no problem...  I got gears coming this Monday,,gonna see how my scoot pushes them with just the few mods I have in my signature,,plan on getting the BBK real soon too,,Im striving for a comfy cruising speed between 45-55 with a lower RPM 5-6K,,right now I cruise at 45 but tach 6K,,my top speed is close to 55 depending on the terrain and thats around 7500 R's ... |
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Post by rockynv on Jul 4, 2014 22:47:38 GMT -5
How long have you had the bike and how many miles are on it? It may just need to be serviced completely or it may be worn out and in need of an engine rebuild. You are talking about a what is more or less a 10 year old bike that could be quite worn out at this point or you could be talking about something that has been sitting for years and really needs to be gone though to be returned to full service.
Before you start throwing money and upgrades on the bike more info first and lets see what you have.
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Post by shalomdawg on Jul 5, 2014 0:54:50 GMT -5
howdy, yup , I agree with above but first i'd suspect the belt is slipping which is why your speed diminished so much with the slight amount of weight.
lotsa miles and smiles to ya
ken
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Post by prodigit on Jul 5, 2014 2:42:16 GMT -5
Belt slip would go with sound.
Belt wear would go without sound.
Check your RPM at top speed if you can.
If you notice the RPM have increased to maintain top speed, more than likely it's a worn belt.
a tuned 150, should be able to do ~60MPH.
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Post by urbanmadness on Jul 5, 2014 2:59:58 GMT -5
My old 150cc, with only a 115mm variator and 12gram wights and my big 300lbs would cruse at about 52ish and top out at 58 via GPS and it was a 10" wheeled scooter.
I reworked a buddies 150de, ran a pod, and exhaust and re jetted the carb and it helped but it really woke up when we added the 115mm variator and 12 gram weights. Best bang for the buck is the Variator in my opinion.
When you do the variator, do the belt too and don't buy a cheap belt either. I really like the gates powerlinks. Heck I like gates in general. I even run them on my gold-wing and my Ridgeline.
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All throttle, no bottle.....
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Post by Noneshere on Jul 5, 2014 3:47:09 GMT -5
Dropping down to 11 gram rollers on my 13" rim scoot really helped with the sluggish hill climbs.
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Post by rockynv on Jul 5, 2014 8:16:56 GMT -5
My Lance Vintage 150 which I purchased used in pretty poor shape with 3,744 miles on it just by getting the stock parts cleaned and adjusted correctly would cruise at 55 with my then 265 lbs on it and after replacing the variator, that was severely grooved up, with the Hoca 115 (12 gram rollers) and Gates Powerlink Belt along with fixing the collateral damages from that which included a new standard clutch along with the input bearings in the gearbox got me a 60+ mph cruise and a max of closer to 70 mph per gps. I had a cdi and ignition pickup fail so I got the orange set from Scrappy to replace it however the cylinder, piston, head, cam, carb, gearset and muffler were all stock.
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Post by blarboose on Jul 5, 2014 15:19:47 GMT -5
I really really appreciate all the advice, but... most of this is flying completely over my head. I have no idea what a variator or a CVT or a CDI is. Honestly, cleaning out the carb was a bit beyond my comfort zone. Replacing the spark plug or fuel filter or air filter or changing the oil or adjusting the idle screw or air mixture screw is just fine, but all the stuff you guys are talking about now is way beyond me.
I dont mean to be ungrateful- I really do appreciate all the advice- Im just a noob at all this so I dont understand most of it.
Taking apart the carb was like just about as far as I feel comfortable going, but going into the motor itself and changing pistons or whatever else... yeah I dont nearly trust myself with that sort of thing.
Is there any way you could... kinda dumb down what has been said? What kind of things can I do that dont require pulling my bikes guts out and messing around with them?
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Post by DaveC on Jul 5, 2014 15:54:03 GMT -5
Upgrading to diff sliders, cdi, etc is all good, for a couple mph.
The obvious to me is, get a bigger scooter.
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Post by blarboose on Jul 5, 2014 20:00:19 GMT -5
Ok, so I went and looked at the belt and everything in there, and the belt didnt LOOK like it was worn or needed replacing, but then I dont really know what it should/shouldnt look like so... I took a video of the belt and everything when the bike is running. Hopefully some of you guys will be able to give me some insight based on it.
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Post by alleyoop on Jul 5, 2014 20:15:46 GMT -5
The belt looks good, what I did notice is at WOT it was hesitating doing a humm, humm, that is where you are loosing some top end the rpms were not holding. Running a little lean on the top, turn the fuel ratio mixture screw on the carb 1/4 turn COUNTER CLOCKWISE to richen it up and bring it up to WOT again. If it is still there turn it 1 more 1/4 turn counter clockwise. Alleyoop Here is where your Fuel Mixture is on the carb:  |
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Post by blarboose on Jul 5, 2014 20:37:38 GMT -5
I will try that out tomorrow and post the results. Thank you. |
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Post by jerseyboy on Jul 5, 2014 21:07:43 GMT -5
If the belt is between 19-20mm thick its good,,idle is a little too high and I think alley hit the nail on the head,,sounds lean on the top,,its definitely a fuel/air issue just not sure exactly where..
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octane, but didnt notice any difference.
..BAD TO THE BONE..
