Re: The Honda CB Twister

I doubt if the power is distributed properly among the gears because whenever I shift from 1st to 2nd there is an initial stalling.I think the 1st gear doesn't generate enough momentum for the 2nd to operate.Is this normal?

Re: The Honda CB Twister

check the clutch free play...may be it requires some adjustment. you need to partially use clutch in second gear during initial acceleration for smooth transfer of power from 1st to 2nd gear. also check the idle RPM...if it is set low then bike will stall. by the way first and second gear on Twister are very closely mated.....so first gear is just to get the bike moving from standstill and second gear is for actual riding.

Re: The Honda CB Twister

ok buddy,I'll check the clutch freeplay.I am planning of a rear tyre upgrade.I think I can have dazzler's stock rear tyre for my twister.It looks heavy too.

Re: The Honda CB Twister

folk, need help to read a sparkplug, i have attached a snap shot of my sparkplug, i know that a proper setting is to see brownish color but the question whether i consider the color at the tip of the sparkplug or the ceramic tip of the spark plug or the base of the sparkplug. You can see from attached image that the tip of the sparkplug seems to be dark gray, ceramic tip is dark brown and the base of the sparkplug has black colour, also there seems to be oily stuff the svrew thread part
If anybody has a snap shot of sparkplug on their perfectly machine would also help
Thanks

Re: The Honda CB Twister

I am feeling that your are running with rich carb setting because there is petrol trace in your plug threads. May be your bike will give you black smoke when you rev hard.
If you are familiar with AFR screw and Idling screw follow as below.

1.Mark your present position of your AFR screw in case to revert back. I guess it is less than 1 full turn from fully closed position(clockwise).
2.If you reach fully closed position(please be gentle don't apply pressure), slowly turn anticlockwise to 1.5 turns(360+180 deg).
3.Start the engine and warm up and then adjust the idle speed using Idling screw.

Ride your bike normally for few kms and inspect your spark plug.

Re: The Honda CB Twister

dude, the pic is bit dark to read.....but condition is not bad...seems little rich setting. even with good tuning ,spark plugs can show black spots if you are doing Continuous low speed driving and/or short trips. this link below will give idea on how to read spark plug.

NGK Spark Plugs USA

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110/80 is bit too large for Twister....go for 100/90-17.

Re: The Honda CB Twister

Hi to all after a long rest i'm coming back.

You have to go a local fabrication shop. There they will fix the both bar & the lip together by welding, i did this on my bike on both side bars.

Which bike crash guard is tihis.

Bro first check both the 10 & 15 Amps FUSE which placed near to battery.

I've used Shell Petrol as you said i too got something around 85kmpl mileage but for my bad luck no bunks near to home.

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Friends yesterday i've replaced the rear shocks to Pulsar 150's one
Seat height got decreased but shocks absorbing quality is good.
And changed the chain sprocket & engine oil
Carburetor got cleaned

1. Pulsar shocks - Rs.1420
2. Chain Sprocket - Rs.880
3. Engine Oii elf gold - Rs.240
4. Labour - Rs.250

Re: The Honda CB Twister

Thanks for the quick response mrbabu
My bike gives black smoke under following conditions
1. Run the bike for some time to ensure it has warmed up
2. Keep the bike in idle for some time ( say 30-40s in a traffic signal)
3. increase the throttle -> the bike behaves like the fuel is cut off and i see black smoke and after that bike returns to normalcy

If the turn AFR to even 1/8th anti clockwise from the setting i dont see this problem, but i suspect that the mileage would take a hit as the mixture is turning richer, but the picture seems to indicate its running rich already !!!

I didnt understand your comment 1 and 2 above, Im guesing you meant 2 full turn from fully closed position ? my understanding is that turning the AFR screw wuold make the mixture lean, please correct me if Im wrong

Re: The Honda CB Twister

Please understand that if you turn the AFR screw anticlockwise lean mixture not rich. Adjust accordingly and post here. Default factory setting in my bike was 1.5 turn anticlockwise after fully closed position.

Re: The Honda CB Twister

OK, this is new to me, i had read this carb tuning guide posted in http://**********.in/tuning-carburet...el-efficiency/

Quoting from this
"Fuel screw is located on the carb but its near the engine. [Engine - Fuel screw - Carburetor]. If the make of your carb is Mikuni (Pulsar, Yamaha, Fiero) the fuel/air screw probably will be of brass (golden colour). If you fully unscrew this screw and take it on your hand, you will see a needle like tip.

Apart from the above difference I gave between Air and Fuel screw, there is one more major difference. Fuel screw turned in (clockwise) gives a lean mixture and turned out (anti-clockwise) gives a rich mixture. Air screw turned in gives a rich mixture and turned out (anti-clockwise) gives a lean mixture. Lean means more air, less fuel. Rich means more fuel, less air. This ends the basics. "

i thought all the 4 stroke engines came with fuel screw and so turing them anti clockwise would make the mixture more rich, Is this different for Honda engines ?

Re: The Honda CB Twister

Bro internet blogs will confuse you. For a moment forget everything and understand that Twister has an air screw. Based on this try your tuning, you will get results.
First try with default 1.5 turns out then do your experiment.

Re: The Honda CB Twister

that tutorial given on" B I K E A D V I C E" blog does not apply to Twister. Twister has Air screw.....this air screw controls the amount of air flow. If you turn the screw anticlockwise it will allow more air to pass and therefore the mixture becomes lean and turning it clockwise will reduce air flow which will give rich mixture. so you need to give just the right amount of air. quantity of fuel delivered will not change....since it depends on size of jet installed in carburetor. hope this helps.

Re: The Honda CB Twister

Thanks sachin1111 and mrbabu this definitely helps , BTW i think i forgot to mention earlier but my bike is Dream Yuga and I know I should have posted this in DY thread but i felt I would get better response from Twister thread as its more active and has more friendly community and i thought the engine mechanicals are the same for both, looks like no two bikes are the same
Do you know by any chance that the same carb is used on DY as well ? I think the settings may not be the same as Twister but if DY also has a Air screw instead of fuel screw then that explains behavior that i have seen with my bike
Also general question, how do i identify if its a Air screw or a Fuel screw available on carburettor ?

Re: The Honda CB Twister

In general , if the AFR adjustment screw is nearer to the air-intake port of the carburetor it's an air-adjusting screw . If it's nearer or adjacent to the fuel intake on the carb , it's a fuel adjusting screw .
The carburetor used on twister / yuga is very closely similar to that on the splendor engines . It's an keihin PB unit . Possibly they are the same , given honda's trait of reusing well tried & tested parts from their inventory on newer models .

Re: The Honda CB Twister

Thanks Pinaki, i have attached a picture of my carb, i found PB on the carb but didnt find any marking of Keihin but it looks like this is what you have mentioned above
Also I also noted that the fuel pipe from the fuel cock is connected behind the carb and the AFR screw is not necessarily closer to the Fuel inlet so it looks like its more a Air screw than Fuel screw, Im planning to turn it anti clockwise a little and see how the bike responds and also note the mileage impact

Some more questions

1. What does PB stand for?
2. Is this a conventional Carb or CV carb? didnt find anything on searching over net but mrbabu had mentioned some diff between CV and normal carb and my understanding is that this is a normal carb and not CV
2. Does anybody have such picture of twister carb, i tried searching forum but found only two pictures from Sachin but cant make out if its same as DY

BTW on some googling i found this website showing difference between Air and Fuel Screws, it looks like Air screw will have blunt tip and Fuel screw will have a sharp tip

has anybody removed their Twister card AFR screw and checked out ?