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**dafc** · 02-08-2011, 06:34 PM

My RX doesn't like BPR5HS she starts misfiring and fluttering at mid to high RPM

**dafc** · 02-08-2011, 06:39 PM

Originally posted by dpak89 View Post

so you say irrespective of the tuning the bike has been set....a wrong plug goes well/in par with stock plug in terms of timing??

lol!!!

hope we get more light !!

take a picture of your spark plug like I told you to pretty please?

**dpak89** · 02-08-2011, 06:40 PM

Originally posted by dafc View Post

My RX doesn't like BPR5HS she starts misfiring and fluttering at mid to high RPM

yep!!! this is what i wanted!! my bike reached 110 after a bit of struggling only!!! ( with BPR5HS) and as you said in high Rpm it was like roaring ,still i felt losing something !! now since i know the reason i have to check with stock plug and test it!!!

**dafc** · 02-08-2011, 07:14 PM

Lol you guys we have totally hijacked this thread hahahaha the starter doesn't even post in this thread anymore lol from 2t oil to spark plugs hahahahaha

**dpak89** · 02-08-2011, 07:24 PM

Originally posted by dafc View Post

take a picture of your spark plug like I told you to pretty please?

i am rite now in office bro!! will get bak home and take a snap and will post it 2morrow!!

Originally posted by dafc View Post

Lol you guys we have totally hijacked this thread hahahaha the starter doesn't even post in this thread anymore lol from 2t oil to spark plugs hahahahaha

lol!!

i hope he's trying to resolve the problem!! and if we'r even 0.1% correct in pointing him towards the solution then thats very good!! thats what he needs!! as aargee says DIY always!!

**raghu_shekar** · 02-09-2011, 01:50 PM

Guys: I dont post because as DFAC told, this is not what i started the thread for...

Secondly, i have seen a considerable decrease in the smoke by doing a trial and error on the premix. Am very happy with the results.

Finally, i was getting to know a lot more about these things, that i just want to keep the flow going and getting to know new things.

I just love the look on my mech s face when I tell him what to do and what might be wrong...

I do make it a point to check out this thread everyday to see what new advancements and queries are being fired and resolved..

I am also going to get myself the NGK 7HS plug very soon.
Now what i am left with is the jerking of the bike. Not sure if you guys remember, but i had told about this in the same thread.

The bike jerks when in motion and the accl completely off/down.... Also noticed that holding the clutch at such times does reduce and gives me a smooth ride... So may be this can narrow down the possible solution and give you guys a somewhat clear idea about the problem.....

**aargee** · 02-09-2011, 02:23 PM

Originally posted by raghu_shekar View Post

The bike jerks when in motion and the accl completely off/down...idea about the problem.....

This issue is simple to fix; just open up the carb & put your needle clip one position above from what level it is now. I hopefully think it should be at middle or 4 from top, if it isn't, pls let me know. After this, you'll have to play a little with air screw (rich) to get the AF mixture right.

**karthikdattag** · 02-09-2011, 03:45 PM

Originally posted by raghu_shekar View Post

The bike jerks when in motion and the accl completely off/down.... Also noticed that holding the clutch at such times does reduce and gives me a smooth ride... So may be this can narrow down the possible solution and give you guys a somewhat clear idea about the problem.....

When you press the clutch (during running) does the bike gets switched OFF with throttle in closed Positon ? If it keeps idling, then the problem of jerking has to do with idling. For 2-strokes, we never use idling, that is key to produce that humming sound when the throttle is closed.

Here is what you need to do, set the idling to zero (adjust the idle screw such that the moment you let go the throttle the bike should automatically switch OFF, that is because the fuel is cut-off) & with that whatever speeds you are running (range 10Kmph to Max speed), you wont experience any jerking. But driving a bike with zero idling needs some practice & it comes with experience.

If you feel this was helpful, then try this out & post the results.

P.S: Never hold the clutch for long duration during running (when engine is ON & engaged in gear), it will increase the wear & tear of plates.

**aargee** · 02-09-2011, 03:51 PM

Originally posted by karthikdattag View Post

For 2-strokes, we never use idling, that is key to produce that humming sound when the throttle is closed.

Sry Karthik, I need to disagree upon this one here. You need to try SriramEFunds's 135. It idles good, not like 100 though, but decent, not too much noisy stuff like that. On any gear, without holding the gear, the humm is a melody to hear. If the clutch is engaged, one can hear the idling sound. IMHO, it can be done.

**karthikdattag** · 02-09-2011, 03:57 PM

Originally posted by aargee View Post

Sry Karthik, I need to disagree upon this one here. You need to try SriramEFunds's 135. It idles good, not like 100 though, but decent, not too much noisy stuff like that. On any gear, without holding the gear, the humm is a melody to hear. If the clutch is engaged, one can hear the idling sound. IMHO, it can be done.

You can never do that at low speeds. Try speeds below 30Kmph on a 5-speed machine or even a 4-speed machine. What i have told is a simple solution & this is the way we ride RX or Shoguns in Mysore & Bangalore.

A zero idling has an additonal advantage of a bit higher FE, not too much, but for sure noticable. None of our 2-strokes run with idling set.

**aargee** · 02-09-2011, 04:04 PM

Originally posted by karthikdattag View Post

You can never do that at low......even a 4-speed machine

Well, I'm not going to answer further, I'll let Sriram speak for himself. I'm quite confident as what I experienced on his 135. And the reason? Damn!!! I'm trying hard over several months on my TM28 combination & after months of frustration, I'm on my way to plonk stock. His 135 is my inspiration on this front

Originally posted by karthikdattag View Post

What i have told is a simple solution & this is the way we ride RX or Shoguns in Mysore & Bangalore.

Just like the humm is orgasmic, when the vehicle comes to halt, the engine also cuts off, which is quite irritating for "inexperienced" riders.

Originally posted by karthikdattag View Post

A zero idling has an additonal advantage of a bit higher FE, not too much, but for sure noticable.

Negligible actually. Yes, though.

**karthikdattag** · 02-09-2011, 04:10 PM

Originally posted by aargee View Post

Just like the humm is orgasmic,

It gets even more orgasmic if you have a hot chick sitting back. Then you have multiple orgasms...

Can sriram throw some light on this fact as well !!!!

**raghu_shekar** · 02-09-2011, 04:39 PM

@aargee

This issue is simple to fix; just open up the carb & put your needle clip one position above from what level it is now

Will check this over the weekend.

After this, you'll have to play a little with air screw (rich) to get the AF mixture right.

Really embarassed to ask this

, but where can i find the air screw. Is it the one that we tune to change the idling of the bike..?
@karthik

When you press the clutch (during running) does the bike gets switched OFF with throttle in closed Positon ?

No it doesnt get switched off..

then the problem of jerking has to do with idling. For 2-strokes, we never use idling, that is key to produce that humming sound when the throttle is closed

I just cant do without idling. Hate it when the bike switches off the moment i stop acclerating.

Here is what you need to do, set the idling to zero ........... But driving a bike with zero idling needs some practice & it comes with experience

I can give that a try. Will do it today and let you know the results tomorrow..

**dafc** · 02-09-2011, 04:49 PM

Okay guys I can confirm the height of the float has a LOT to do with idling and the low end grunt. I adjusted mine using a vernier caliper today and damn I was blown off by the low end my RX has never felt so peppy and it always felt like a dead horse at the low end but now it feels just like an RX should, twist throttle and off we go!! Sad I am probably going to split the crankcase next week

@raghu_shekhar get yourself a vernier (buy, borrow, steal) and adjust the float height without it you will never get her to idle right

**aargee** · 02-09-2011, 06:04 PM

Originally posted by raghu_shekar View Post

Really embarassed to ask this

, but where can i find the air screw. Is it the one that we tune to change the idling of the bike..?

Don't be!!! Everyone learns through questioning, including me. This one is VM20, which should look sth similar to yours, VM22

If you notice a screw that is right most or right to the idle screw, that is air screw. Let me know if you still find it difficult to identify.

Originally posted by raghu_shekar View Post

I just cant do without idling. Hate it when the bike switches off the moment i stop acclerating.

hmmm...for this you need to play with the idle screw. If you've both jerking & this issue, then you need to play with needle, air screw & idle screw.

Originally posted by raghu_shekar View Post

I can give that a try. Will do it today and let you know the results tomorrow..

If you're doing it for first time, I'd encourage you doing it over weekend or just ensure you've plenty of time to carry out, if for first time.

Originally posted by dafc View Post

adjust the float height

I'm little confused

, can you help me understand what is float height & how does one adjust? Tks.

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