re: CBZ xtreme / Hunk

Nope. You will have to place an order, usually it takes a week for this part to arrive.
Try at your local authorized distributor.
Part # 45108-ML7-922 SPRING,PAD

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Sorry. I missed a lot of updates. From now onwards I will try to update the thread regularly.

My xtreme's speedo was going bonkers whenever the throttle was opened suddenly while overtaking.
If the throttle was opened at 77kmph, the meter started to show 85--> 95 then 107.

The problem was a loose pin of the speed sensor connector which developed loose contact when the front-end raised during acceleration.

Removed the headlight assembly.




Notice the white wire which was loose in the connector.



Pushed it back into the connector.



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Where did my previous post disappear ?

re: CBZ xtreme / Hunk

I've few queries pertaining to pilot-screw & idle/throttle adjustments

1. I've seen SVC personnel using a CO-HC gas-analyser and adjusting pilot-screw turn-count based on emission @idle RPM. Does that mean emission @cruising RPMs (say between 5,000 to 7,000 RPM) are within emission limits?

2. Say I tuned a carb of properly warmed up engine @3,000 idle RPM & got highest Rev-Point @ 3 turns (stock is 2 turns). Will I get same optimal turn-count if I do tuning with idle raised to 4,000 RPM?

3. Assuming we found optimal-Rev point @3.5 turns & stock was 1.75 turns. We need to close idle/throttle value more than the stock to set idle-rpm within recommended range. Does this affect choke-start as we're affecting main-venturi opening @close throttle ?

Yes, bike is very responsive; not to mention the weather in B'luru nowadays. I'm yet to perform 100ml can tests to cross-check.

Regarding Cat-Con cleaning:
Does taking motorcycles on long rides at consistent higher RPMs raise Cat-Con temperature high enough to burn soot deposits in/on it? You know like self cleaning temperature on spark-plug(although a bit high here).

re: CBZ xtreme / Hunk

The site has been misbehaving since last night, some niggling issues.. maybe time for a full site service
A few minutes ago, when i tried to click to the pg 925 i.e. this page, it kept going back to 924... just reported it to a mod and on checking back it looks ok now.

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This kind of tuning is called idle drop method. It was neatly explained in the unicorn workshop manual.. shoeb had once sent it to me, cant find where i stored it.. shoeb, maybe can u post that particular page here as a screenshot ?

Go thru the below link , and it really makes some sense too: where he mentions to set the afr screw to between the two idle drop points.
goes like this : low idle (bike shuts down below this -lowest afr turn) --- increase afr turn anticlock wise (rpm increases) --- reaches a point beyond which it stutters/drops
You can leave it at the highest point, or like mentioned in the below post reduce a little further but above the lowest afr..somewhere midway.
Its a trial and error method, And its always good to check the plug color after running a few km and also test the choke on an early morning, before making changes/retuning.

http://xlforum.net/vbportal/forums/showthread.php?t=31262

re: CBZ xtreme / Hunk

Yes, it was misbehaving; some of the services were down. I opened up a thread "xBHP downtime & issues listing" coz they don't have any such page on this site. Apparently Mods didn't approve it.

I think it's browser playing tricks here. I remember facing this problem while browsing on FireFox few years back.

When you ask xbhp to fetch a page say 926 on CBZ-Extreme-Hunk thread. xBHP responds with HTTP-301(moved-permanently) and a redirection URL to page-925.

Subsequently when other users post, page-926 is filled. But to your browser, there is no page-926.

I guess, xBHP ought to use HTTP-302 (assumed temporary redirect) in these cases to assist browsers.

cheers.

re: CBZ xtreme / Hunk

Exactly. Page 925 was getting redirected to pg 924.




The exhaust flame reaches till the bend pipe at high RPM (above 5k). Regular high speed running keeps the combustion chamber as well as the cat-con clean(only if the engine is not burning oil).
If the bike was used at lower rpm and in stop-go conditions which is in the case of city riding then the cat-con doesn't get enough time and heat to self-clean.

Polishing the valves, cleaning the head, piston crown and exhaust every 40,000 km is a good preventive maintenance.

re: CBZ xtreme / Hunk

Don't put much thought into AFR, generally following rule of thumb for a CV carb optimum should be 3~3.5 turns.

And regarding clutch slip, make sure apt pressure is applied to the shifter during shifting and the gears engage properly then do a low speed in final gear and crack open the throttle, if it slips it means the clutch is not properly gripping.


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re: CBZ xtreme / Hunk

Now I am also facing the same problem now it is solved

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re: CBZ xtreme / Hunk

I think 180 degree rotation makes it 1turn

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re: CBZ xtreme / Hunk

No, One turn = 360 degree rotation.

re: CBZ xtreme / Hunk

Ok nice questions there. Let me answer step by step.1. Yes when tuning by gas analyzer then at cruising speed the emission is within specified norms. It is because at idle speed the pollution is more as at open throttle engine gets more air which helps in burning the fuel more. But tuning by checking the air fuel ratio is more accurate but in INDIA air fuel ratio tuning equipment is not available. 2.Yes even at 4000 rpm if you tune then also you will get best tune at almost the same turns. But the thing is at 4000 rpm it becomes very difficult to catch the correct position because at 4000 rpm the needle jet comes into play and also part of main jet. At 3000 rpm the slow jet is at its maximum operating speed and thus we can tune the slow jet properly. Remember when we are tuning the air fuel screw we are changing the slow jet setting.3.No it doesn't affect choke operation because in CV carb choke supplies more fuel rather than affecting the venturi like in slide carbs. The only effect will be that on pulling the choke bike will shut down because by optimal tuning we are supplying engine with correct ratio. If we open the choke then we will flood the engine with fuel and engine will shut down. Let me tell you that in my Joy after i changed my carb and changed from factory tuned to optimal tuning now the bike idles when the idle screw is fully opened. Or in other words the idle screw is fully opened then also engine idles. My bike even if you open the idle screw after the full open position, bike will not shut down. Even in my pleasure after 1000 km after cleaning the head and polishing the valves, set the tappets to 0.10 mm as per manual and retuned the carb and now the pleasure idles with idle screw opened fully. So its not on idling but how you set the air fuel mixture. As for cat con cleaning then let me tell you cat con gets heated to very high temperature in very less time. Unless engine is burning oil cat con will not get clogged. In my extreme i do not worry about cat con as 99% of time it is above 5.5k rpm. If you want to clean the cat con then ride the bike at more than 6k rpm for 10-15 kms and silencer will get cleaned. In fact this should be done in all bikes once in every month to clean the exhaust valves and silencer.The given tuning method is applicable if we have a vacumn pump and also digital tachometer which are expensive. So raising the idle and adjusting is best method as it nullifies the effect of PAIR at high rpm and also at high rpm we can feel the change in response of engine. The donkeys at service center tuned the engine using tachometer in both my extreme and pleasure, bike felt very harsh to ride and mileage decreased. Took both of them to mechanic and he tuned just my sound and both of them flies. latest is i tuned the pleasure myself as detailed above. I am in process of learning the CV carb tuning to perfection from my mechanic and will let you know in detail as soon as i learn from my mechanic all the aspect of how he tunes the CV carb.Yes CV carbs need to be tuned between 3~3.5 turns, but the question is how much is optimal setting whether 3.1 or 3.2 or 3.3 turns. @all- Post more questions about carburettor tuning as tomorrow i will go to mechanic and will ask all your questions in details. So Ask as much as question and i will clear all your doubts by asking my mechanic.

re: CBZ xtreme / Hunk

360 degrees make one turn cycle.


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re: CBZ xtreme / Hunk

To be honest, I don't bother about it much.

Was always conscious about it on my first bike, messed up the screw, it developed excess clearance and air started leaking in.

After that experience I don't care, depending on the bike I set it at 3 or 3.25 or 3.5 turns. Call me extra cautious but better safe than sorry, and Unless you go ballistic with the AFR setting nothing bad would happen to the bike after all it's made to last right.


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re: CBZ xtreme / Hunk

Thanks bro for the suggestion.
I will retune it following your guide soon.
Anyway my bike has done 3000 kms till now. Vibrations reduced quite a lot but still there after 4.5k rpm. I took it once to 105kmph@8500rpm (isnt the rpm too high at this RPM?)
otherwise i am maintaining 6-7k rpm and smooth throttling.

re: CBZ xtreme / Hunk

Ok do as you want and if not satisfied, change to OE settings. Vibrations will reduce after you pile on kilometers. As per speed to rpm ratio, i do not know why members are posting different speeds, because in my bike the speeds are as following in fifth gear:-39 kph - 3k rpm52 kph- 4k rpm65 kph - 5k rpm78 kph - 6k rpm91 kph - 7k rpm104kph- 8k rpm117 kph - 9k rpm121 kph- 9.4 k rpm. I do not know about others but my bike shows these speeds and is constant from the day i purchased bike. Other members may check there bike and report.

re: CBZ xtreme / Hunk

Thank you [MENTION=28527]sibun[/MENTION] for your assist in BBSR , now my bike front shock works 100% better than previous. Could you link me to the post where you posted the "engine oil" of Ap1-sm grade available at shop and other peripherals. After putting 20w 50 , my bike feels so slow at speeds above 50kmph and seems like crawling. As you said, my tappets have to be adjusted, could you give me a date where you'll be available at bbsr so that we can adjust tappets and change to that premium grade oil.