By Mr_Venjer on Tuesday, June 25, 2002 - 04:14 am:

Peeps, I have read varying opinions on this subject. I am seriously thinking of putting my 17T sprocket back on my RSVR. I reach about 40mph at max revs in first and I change up quickly too from 2nd to 3rd because I run out of revs. On a track surely this is a handicap when others can get near 70/80 in 1st.

Yeah it makes the bike run a bit smoother at low revs but it rattles like fook !

Has nyone gone back to the 17T having had a 16T ? Does the Airbox replacement kit have a negative effect on top end performance ??

The Kevman  

By Mr_Venjer on Tuesday, June 25, 2002 - 04:17 am:

I should add too that I got 150 easily on my 2000 RSV. The only mod was a RSC Ti can with chip. I never did a top speed run with the 16T sprocket.

My 2001 RSVR has Rene twin slip ons, airbox replacement and eprom. + 16T sprocket.

Peace  

By Crmc33 on Tuesday, June 25, 2002 - 04:36 am:

If I were you Kev I would try one or all of the following;

check what revs you are pulling at 143mph with the current setup. Maybe your bike has a dip in the power at these revs?

Fit the 17T front on its own and try the speed test again.

Fit the original airbox on its own and try it again.

Genrally just change one thing at a time until a)the bike improves b) you lose your license c)the bike blows up d)you crash e)you get so fed up you just go down the pub and forget about it

My 15T Falco would definately benefit from running the higher gearing as it gets to 162mph and then stops accelerating as the power drops off. The 16T or higher would lower the revs and help give the bike a bit more speed. As you said it also reduces the number of gearchanges too.
OK Im not doing 162mph everyday (every other day yes) but the bike feels a little undergeared now for high speed cruising.
IT does sound to me that your bike isnt running right at the top end tho. A Mille should be equally as strong as a Falco and Id guess that yours will be slightly higher geared even now on the gearing you have.
Are you getting your chin on the tank?
 

By Diablo_Mille_R on Tuesday, June 25, 2002 - 04:46 am:

With a 180/50/17 rear tyre and 16/42 gearing the RSV pulls 8500rpm at 142mph. I'm pleased to say I did not know that off the top of me 'ead.  

By Diablo_Mille_R on Tuesday, June 25, 2002 - 04:54 am:

Go on them Kev, post your dyno plot and if it levels at about 8500rpm then *maybe* that is why it gets stuck at that speed. Does not explain why it won't go though if you get the limiter in 5th before changing though.....  

By Crmc33 on Tuesday, June 25, 2002 - 04:58 am:

...that is, unless the revs drop back down to 8500rpm after the change up

maybe you could jack the rear ride height up further, and then you would always be riding downhill 

By Diablo_Mille_R on Tuesday, June 25, 2002 - 05:24 am:

Is your chain too tight, or worn or rusty?

Are tyre pressures somewhere near 34fr 38rr?

Do you tuck in so you are looking though the bubble?

Just some ideas. My bike has the airkit and it does not seem to bother the top end performance.  

By Crmc33 on Tuesday, June 25, 2002 - 05:52 am:

my chain is fine thanks altho it does choke me a little when I swim.
Thanks for asking tho. 

By Richandall on Tuesday, June 25, 2002 - 09:05 am:

There's a really good thinkpiece at Ken's site on just this topic Mr Venger.

I'd be a bit surprised if a 6.25% change in gearing between a 16t and 17t sprocket accounted for the loss of 25mph at the top end and changing up 30/40mph earlier in first.

Shurley shome mishtake?

- Rich

 

By Crmc33 on Tuesday, June 25, 2002 - 10:39 am:

true
I would expect it to at least rev out in fifth  

By Powermaster on Tuesday, June 25, 2002 - 12:11 pm:

Kevin, you are getting paranoid,
You know I don't need to defend what I do , but the airkit is not a problem, no matter what bhp you get, your gearing is what dictates the top speed, if the bike has the torque it will go, the airkit if anything is an aid. Today I saw the Vmax on a Falco, not Trevor's and it showed 153, the client said, he run out of road and there was more if needed.
Probably is that new rear that you fitted,  

By Hansie on Tuesday, June 25, 2002 - 02:57 pm:

My fully Renegaded Falco gets 160 easy with a very worn chain and 15 front sprocket.and its impossible for me to get fully behind the windscreen.
New set is 16/42 instead the previous 15/41 and suits the bike better. With the airbox improved midrange I dont need the short gearing , it becomes a handycap because the 1e and 2e gears became to short.

Maybe youre chip got damaged with some electro static sparkys?.

Hansie 

By Taffrsv on Tuesday, June 25, 2002 - 03:06 pm:

Kev

I have just got back from a very mental ride tonight, I have been screaming the bike alot in 3rd gear but once it got to 9k it was much better to use the torque in 4th, so try to stop reving to the limit and use the torque and then let 6th run out.

I like you run a 16t sprocket and a airkit my V max is 160 mph and it was still going.  

By Mr_Venjer on Thursday, June 27, 2002 - 11:07 am:

My chain gets lubed regularly although the tension I have not checked. Tyre pressures, errrrrmm ?!

I probably wasn't low down to the tank enough - its a little bit noisy. Think I'll get me some of those ear plugs.

Jorge, not having a dig at the Airbox kit, just throwing in ideas because I am not bike minded at all so I don't know how anything works. "the knee bone's connected to the - elbow. the elbow's connected to the - thigh bone "

Damn you Hansie and Taff . I will get to the bottom of this then crack 160 !!

Rich, I don't know how to post pictures but my dyno chart is on page 2 of the charts on your smartgroups site.

Thanks for the advice. Do not be suprised when this thread rears its ugly head again when I post 16x mph !! If a Falco can do it so can I !!  

By Mr_Venjer on Saturday, June 29, 2002 - 01:20 am:

Yesterday afternoon I went down to Renegade to do a couple of bits. They kindly added an extra piece of metal to the heelguard plate on the right. I managed to melt the heel of a shoe on the exhaust link pipe.

Did a dyno too. I am down 3BHP from the 123.5 I had before. The bike is due for a service soon so I expect normality to resume after that. Jorge let me do my own dyno run too, cool. That exhaust shootout thing is a load of bollox. I saw the difference in having air +5BHP to not having it. Jorge says his products are designed using air (real world) so if you take it away the product will under perform - not below stock though. The guy who did that test is a flukkin plick !!

Jorge also convinced me that I should go back to stock (17T front) gearing. Did it last night and - I can't tell the difference now. The bike is super fast still but I can stay in gears for longer and faster. I can't even see the difference low down. JOrge said that having the Airkit and twin pipes has given me extra power so I wouldn't need the 16T sprocket - but I would gain top end. He is spot on !! It even runs lovely at low revs.

I can recommend going back to a 17T if you have your 16T on. Fair enough, if your bike is stock then the gain is huge. But if you have a race can and airbox kit you have extra power to provide what the 16T provides but with more top end in every gear. I cannot notice a benefit to the 16T now.

Peace to all my nuggas  

By Taffrsv on Saturday, June 29, 2002 - 01:15 pm:

Kev

I would not worry about the loss of 3hp it could be just the difference in different day conditions. As for the bike going faster by fitting the 17t sprocket, it has to it could not do anything else.

Now here's the controvertial bit, you say you are struggling for high mph figures, well I've been studying the dyno shootout graphs and reading a post from a american who had the same system as you, and he sent it back because he was not happy with the flatspot above 7k, and the dyno graphs back this up, he compilmented the midrange but was unimpressed with top end, you say you had a RSC can and chip do you still have it, if so refit it then you can compare systems and if its the same you can knock the exhaust out of the equation.

Taff.  

By Mr_Venjer on Monday, July 01, 2002 - 09:09 am:

Taff I sold the RSC can. Another bit of info. I checked the oil on saturday and ..... the level was below min. It was late and most shops were closed. I went to M/City but they only had 10/40 in semi synthetic. So I bought a litre. I used the whole bottle and went down the road and came back. The oil level did not show. I bought another litre and put roughly 4/5ths in. What a difference. It feels much smoother and easier to pick up speed.

I have overlooked checking the oil before now but never again !

Kevin  

By Dudersvr on Monday, July 01, 2002 - 09:17 pm:

Kevin
i have gone from 16/42 to 16/44 and allthough the bike revs out quickly it is so responsive and not as critical with gear selection that it is easy to ride relatively fast , i noticed an improvement of 10mph down the back straight at snetterton 158mph but crashed shortly after at coram due to a split fuel line otherwise im sure i would have cracked 160 before the day was out .
John  

By Richandall on Tuesday, July 02, 2002 - 02:30 am:

Mr Venger - how many miles did you put on since your last oil change?

I am collecting info on oil consumption, which probably makes me a person

I was caught out by its appetite for semi synthetic and had a real problem finding the same type as originally used - Putoline 15W/50 I think it was.

- Rich

 

By Mr_Venjer on Wednesday, July 03, 2002 - 02:09 am:

Rich, I bought the bike with 900 miles on the clock. I didn't think I would need to check the oil until after the first service. I have done 3500 miles now and used practically 2 litres of oil.

Venjer  

By Richandall on Thursday, July 04, 2002 - 04:52 am:

That's a long way off Beffy's figure of half a litre in 4000 to 5000 miles (I think he said miles not kilos ) which is what I would have expected with max to min at 3/4 litre it wd mean no topping up between service intervals.

So what's happening here folks?

- Rich

 

By Daz on Thursday, July 04, 2002 - 06:36 am:

Are you guys sure the dealers filled it up to max?  

By Birdy on Friday, July 05, 2002 - 07:41 am:

If you do any track days at al a 16 is essential and I would even go with a 15 for some circuits