Question about torquey big Vs

[Owl]

I am curious about iridium plug life too. They come standard on my GSXR and the service scheduled calls for their replacement at 12,000 ks. That is also what the regular plugs are meant to be replaced at on my last bike as well. I will be replacing the iridiums on the GSXR at the suggested 12k service. Just wondering if it is overkill for iridium plugs..?? (some people have had them in other bikes for 50,000 ks plus)

12,000km seems really low and I would've thought 30,000-50,000km for iridiums. The service interval on my stock CR9EK is 20,000km and they last well, but not such a good run out of the CR9EIX. Go figure?

Still, I only paid $11.50+ for the iridiums, so I'm not crying about it.

[Laava]

[QUOTE=varminter;1129738168]
Seen the info' on the power commander & the teka box, perhaps I'll go that way, when I save the money.


Spend $80 on a TRE first, IMHO. Made more difference than the rest put together.

[cowpoos]

Ok, the bike has been at the bike shop for three weeks, in that time they have not been able to duplicate the lurch/cutting out problem. The techo at Suzuki told me that "big v twins are a bit lumpy on low rev's" or words to that effect. The bike shop agreed. They also said they will up the idle speed to 1200 and adjust the lean mixture on low rev's. The problem was cutting out occasionally, usually going slow pootling up to lights etc. It got more lurchy (no such word) when I wound up the throttle from under 1000rpm to 1100. That's when it went GDUMPH and tossed me into the road.
So, what do big V twin riders say. Oh, yes I know there are much bigger one's out there but this is big to me.

Have you got aftermarket pipes?

[svr]

... It got more lurchy (no such word) when I wound up the throttle from under 1000rpm to 1100. That's when it went GDUMPH and tossed me into the road.
So, what do big V twin riders say. Oh, yes I know there are much bigger one's out there but this is big to me.

Plenty of bikes will cut out if you try to drive from those sorts of revs! Turn up the idle a fraction and use your clutch and some some revs.

[DMNTD:Me]

I've always gone -1 on the front sprocket to help with its 'lurching' which can be seen as fueling issues, whilst attempting to ride at lower revs.
In saying that it does sound like you have 91-itis too

[mrchips]

From what i understand these engnes are tuned quite lean.

fwiw i would feather the clutch at those low rpms. If i tried to give my SV throttle from 1100rpm she'd buck like a mule + i think using 95 gas or above) is a given.

[varminter]

Great advice here. Only got the regular pipes.
Looking forward to getting back on the road, the push bike's ok and it gets me fit but I can only overtake old ladies on zimmer frames....and some of those are a challenge.

[CookMySock]

A bit off ball this one but ............. is your chain adjusted correctly?
I've noticed on some bikes that if the chain is loose and you are poodling along very slowly as you describe you'll sometimes get backlash and jerking in the manner you describe.

Yes.

They should idle at MIN 1200rpm

Yes. I use 1500rpm.

Vtwins are really sensitive to these things. Though at the best of times they are snappy and snarly at low revs - thats part of their character.

Steve

[mashman]

The RSV stopped stalling at the lights once it had been remapped... I just thought it was an Italian thing... good luck

[boman]

I found that a K&N Air filter, removed the snorkel, seemed to smooth out the bike a lowish revs. I have a roundabout, at Clarks beach intersection, that the bike used to jerk and lump around in first. After I fitted the filter, and removed the snorkel, it was heaps better. This could be coincedence, but it was worth a mention to you ,I feel.

[TripleZee Dyno]

Ever had an issue with iridiums TripleZee? Just curious, as my 1050 killed a set in less than 10,000km. Signs of excessive heat, with discolouration on the insulator etc.

Always had a good run out of them. The worst thing they ever did was nothing. Does seem a bit odd that yours overheated. I always use the reccomended heat range unless there is a good reason to change. The ones in my present bike have done 22000k. Havent looked at them since I put them in, if I find some spare energy I'll pop them out and have a squiz.

[scumdog]

Never had that sort of issue with any of my V-twins although they can be a tad 'jerky' until warmed up.

And 1200rpm is about 300+rpm higher than they idle at when warmed up.

Never had a fuel injected V-twin though.

[CookMySock]

You might richen the idle jets 1/4 turn and see if that does it.

Steve

[Devil]

The SV/DL1000 is known to be very lumpy at low revs, doesn't like it at all. Get those revs up as previously suggested.

[98tls]

The earlier version ie the TL had some issues at low rpms in particular the stumbles at around 3000,i fitted a atre and reflashed my ecu with a yosh box,on the tre thing theres 2 types,auto and not,get the auto.Wouldnt have the idle set at anything under 1200 on my TL fwiw.