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**RohIIT** · 07-12-2013, 06:13 PM

re: CBZ xtreme / Hunk

Originally posted by virendrapareek View Post

I haven't had the fork oil changed in a while, so I will get that changed in her next servicing, which is 1200 kilometres away.

Personally svc guys dont care anything about our bikes , they tighten things without care and it does more damage . Regarding fork oil change , it is simple and one can do it with few tools at home . I recently reconditioned my splendor`s forks with help of friends in splendor thread . The amount of oil in fork matters a lot . I dont know how much goes in Xtreme`s fork , senior members can help on that . in short

More OIL = Hard Shocks , Less oil = Softer ( Soggy) Shocks

**virendrapareek** · 07-12-2013, 10:16 PM

re: CBZ xtreme / Hunk

Hi Rohit,

So which one is better? more oil or less oil?

Originally posted by RohIIT View Post

Personally svc guys dont care anything about our bikes , they tighten things without care and it does more damage . Regarding fork oil change , it is simple and one can do it with few tools at home . I recently reconditioned my splendor`s forks with help of friends in splendor thread . The amount of oil in fork matters a lot . I dont know how much goes in Xtreme`s fork , senior members can help on that . in short

More OIL = Hard Shocks , Less oil = Softer ( Soggy) Shocks

**RohIIT** · 07-12-2013, 11:06 PM

re: CBZ xtreme / Hunk

Neither of it , it must be in equal quantity , just 10 ml of more or less oil and it will lose the effect of shock absorbing.

**sinnerz2000** · 07-12-2013, 11:08 PM

re: CBZ xtreme / Hunk

Originally posted by RohIIT View Post

Neither of it , it must be in equal quantity , just 10 ml of more or less oil and it will lose the effect of shock absorbing.

AFAIK u get different oil grades for hardness or softness.

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**RohIIT** · 07-12-2013, 11:41 PM

re: CBZ xtreme / Hunk

Generally 20w grade is used in forks , but quantity also matters .

**sinnerz2000** · 07-13-2013, 02:11 AM

re: CBZ xtreme / Hunk

Originally posted by RohIIT View Post

Generally 20w grade is used in forks , but quantity also matters .

True.

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**Pinaki** · 07-13-2013, 04:57 AM

re: CBZ xtreme / Hunk

Yes , fork oil grade also affects the hydraulic properties of the shock absorber . But generally fork oils are of around 10W grade , not 20 . A 20 would make it more harder to compress & slower to rebound . I am also confused why motul is selling fork oil in 5W and 20W grades . Honda specification is 10W .

**nishesh.kumar** · 07-13-2013, 08:58 AM

re: CBZ xtreme / Hunk

Hi Guys,
I'm observing that front forks of my xtreme are not able to damp efficiently. When I go through any speed braker or bad road, front forks are hitting the mudguard. I changed the fork oil 3 months ago with 'Endurance' brand.
Any suggestions

**ashwin.terminator** · 07-14-2013, 09:01 PM

re: CBZ xtreme / Hunk

Originally posted by mrbabu76 View Post

You try that in 4th gear, because I think either you over geared it with 15T sprocket or lean mixture for big bore.

I'll need to head out to the open road again to try that, and this time, without a pillion.

Originally posted by RohIIT View Post

It may be as you said due to pillion weight , i too feel loss in power when a person sits in back , as i am habituated to drive alone . Another reason is that bore is not free revving at this moment and will require more kms , i have done 5400kms on stock bore and it takes lot of time to hit 9k whereas Sibun's extreme hits more easily . Third is you might be running lean or rich carb afr , this you can re adjust and test again .

Whenever I tried tuning the carb, I messed it up somehow and I ended with a mileage of <40. Since I'm consistently getting 45 now with the big bore and the 15T sprocket, I believe I can be happy with the mileage I am getting.

But I don't want to try tuning the carb and messing it up again.

Originally posted by sibun View Post

Regarding top speed then let me tell you that at 3.5k only do not try to test top speed, run it for another 3.5k and then test. Also 10W 40 when heated affects top speed and do not let the engine rev quickly. Also check your air-screw ratio as i think you are running rich. Let me tell you that extreme runs 128 main jet and a slight rich slow jet setting will maifest itself too much rich and full throttle opening. Another reason is that with pillion weight will increase and bike will rev late. Ours run CV carb and i very well know the difference in CV carb and slide carbs, as my joy has slide carb and my extreme has CV carb. In slide carbs you pull the slide with your force when you twist the throttle so fuel is delivered with your throttle opening, and thus bike pulls hard irrespective of load, but in extreme even if you twist the throttle then it will open the throttle plate and slide will increase when engine rpm increases. So revs building get late with load. Although my joy is less powered than my extreme but throttle response is quick in my joy thanks to the slide carb. So that is one reason.

Next is that Hunk has a more upright seating position which is less aerodynamic and thus rev doesn't climb till redline soon. Extreme is more sporty and riding position is more aerodynamic than hunk so revs easier towards red line. The importance of aerodynamics i knew when i rode my friends first model extreme which has been modified with R15 fairing. Man that bike was pulling towards 10k rpm easier as that fairing was giving it more aerodynamic stance.

Next your air fuel ratio as you are running big bore so you will need more air. What you do is if you have a friend who has karizma then borrow his carb and use your main jet as karizma runs 125 main jet and extreme 128. Then check how well engine is pulling.

Lastly borrow a extreme CDI and test. But my advice would be to wait for some more kilometers before doing experiments.

Whoa, those are a lot of reasons. :P For starters, I think I'll try without a pillion. :P

And no friend with a ZMA, so no carb experiments. :P And when I had been to the stockist the last time, a person bought the ZMA carb and it cost him 5k! :O
And appears like the CDIs are indeed different.

The aerodynamics well, I didn't know it'd make that much of a difference. But now I wouldn't mind designing my own fairing(though I know this would be impossible :P) If only they made aftermarket aerodynamic kits now.

Hunk CDI Part Number is 30410-KVN-901
Xtreme CDI Part Number is 30410-KVE-861

Are these cross compatible? And how much would a CDI cost? If the Xtreme gives more mileage and hits the red line as well, I wouldn't mind the switch either.

Thanks a ton guys, this forum teaches me something new everyday!

EDIT: Looks like the CDI will cost between 800 and 900 rupees.

**nishesh.kumar** · 07-14-2013, 09:48 PM

re: CBZ xtreme / Hunk

Originally posted by nishesh.kumar View Post

I'm observing that front forks of my xtreme are not able to damp efficiently. When I go through any speed braker or bad road, front forks are hitting the mudguard. I changed the fork oil 3 months ago with 'Endurance' brand.
Any suggestions

Please reply on my previous post..

**RohIIT** · 07-14-2013, 10:10 PM

re: CBZ xtreme / Hunk

@nishesh What grade of fork oil are you using ? Endurance is a quality brand and its forks are used by Pulsars. Also 20W grade is to be used as ppl say , the small change in oil quantity leads to soft or hard shocks , I dont know how much oil does xtreme fork use afaik Karizma uses 145ml and splendor 160ml . @All can someone tell amount of fork oil required in xtreme ?

EDIT : Honda fork oil comes in 10W grade , i think it is OE as unicorn and xtreme`s fork are almost same . Some one please comment on this too

**nishesh.kumar** · 07-15-2013, 12:09 AM

re: CBZ xtreme / Hunk

Thanks RohIIT for your reply.
I could not recall the grade of Endurance fork oil, but the mechanic put 175 ml each in both the forks since the volume of bottle was 350 ml.
Please suggest the correct grade of fork oil for xtreme and should I change the fork spring as well

**shoeb2015** · 07-15-2013, 06:32 AM

re: CBZ xtreme / Hunk

Recommended capacity is 155~160ml.
20W fork oil gives better damping(but harsher ride) and does not bottom out easily.
10W is ideal only for city riding . I think the stock oil is 10W and is not upto the mark.

@sibun can comment on the 20W oil as he is using it in his bike currently.

Generally,
Thick Oil= Stiff and better handling
Thin Oil = Comfortable ride

*There are exceptions.

**Imran Syed** · 07-15-2013, 10:20 PM

re: CBZ xtreme / Hunk

My hunk on odo 12 k doesn't reach 120kmph even with lot of struggle and push. What's the problem ? Bike is very smooth and mileage is around 47+
Which spark plug is better for hunk ? I think I'll change spark plug and filter

Sent from my Nexus 4 using xBhp Connect mobile app

**ashwin.terminator** · 07-15-2013, 10:31 PM

re: CBZ xtreme / Hunk

Originally posted by Imran Syed View Post

My hunk on odo 12 k doesn't reach 120kmph even with lot of struggle and push. What's the problem ? Bike is very smooth and mileage is around 47+

Sent from my Nexus 4 using xBhp Connect mobile app

Because it can't. :P Hunk maxes out at around 114-117kmph. Unless you sprocketed the bike, don't even think about 120kmph!

----consecutive posts auto-merged-----

Originally posted by Imran Syed View Post

My hunk on odo 12 k doesn't reach 120kmph even with lot of struggle and push. What's the problem ? Bike is very smooth and mileage is around 47+

Sent from my Nexus 4 using xBhp Connect mobile app

Because it can't. :P Hunk maxes out at around 114-117kmph. Unless you sprocketed the bike, don't even think about 120kmph!

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