Ducati Monster Forum

Maybe it's a sprocket issue? 6th gear on the 1100 evo I just picked up is definitely useless. But for some reason, I have a much easier time getting to triple digits on my old 1999 m900 city.

I have this nagging feeling that efi sucks.

Don't think it's the EFI. My 2000 M900 EI feels a lot faster than my S2R1000.

Same transmission.
The 1100evo has an 8% taller primary gearset.
Final drive is likely different.

But that doesn't really matter, whichever bike is geared taller, you'll just hold it in a lower gear a bit longer.

Perhaps the 1100 is sick.

the 1100 is brand new! just got it today.

also, me no speaka no engineering. what do you mean 8% taller? and why is sixth gear so toothless?

i noticed a lot of people go to a 14t front sprocket -- some have said it's geared the way it is stock to pass emissions. should i change front or rear sprocket to less or more?

help greatly appreciated  [beer]

If it's a new bike, maybe triple digits shouldn't be a goal when it's being run in...

Many bikes feel 'slow' when they're new because they haven't yet been run in = metal parts don't move smoothly against each other.

There are gears between the crank shaft and gear box, primary gears - they work in the same way as gears in the gear box and final drive sprockets - deciding bike speed related to engine revs. Even before you start to operate the gear lever, or change sprockets, the Evo is 8% taller than the old 900. 'Taller'/'heavier' as in... 2nd gear is taller/heavier than 1st.

The gear box and sprockets being identical, the primary ratio differing 8% - your Evo needs minus 1 front tooth AND plus 1 rear tooth to get the same gearing as the 900. Then, in theory, it 'should' feel similar...  ..... which is a meaningless theoretical exercise since the engines are so different. Wait for the Evo to be run in and come to life AND/OR fix it if doesn't trash an old 900.

Was your old 900 modded for performance or a stock W head motor? From the specs, the evo1100 has higher comp, bigger valves, warmer cams and more capacity, but would have EPA gearing and jetting. If you put V heads on your 900 then it would probably have slightly hotter cams than the evo iirc, but still be down on comp, valve sizes, ports and of course capacity.
With the gearing and fuelling sorted, you'd think the evo should blow your old 900 into the weeds.

break in?  [evil] i don't think so.

thanks guys! i'm ttaking it to the safety track tomorrow.

Gearing could be an area that makes the difference.  My 62HP M750 (+3 rear sprocket) leaves the line like a rocket but only has a top speed of about 110 now, if even that.  If your 900 has had a sprocket change, that could make the difference.  Also, if something is sluggish in the highest gear available, it doesn't concern me a whole lot.  That really tall highest gear may be for MPG numbers or similar. 

JM

I realized tonight the sixth gear is only for 85+ mph

6th gear is useless below 80mph.  14T front sprocket makes a world of difference.  First mod I did to my bike.

[thumbsup]

Give it 1,500 miles too without melting the pistons.  ;D

At the same road speed...

my M1100 feels slower than my DR650  ;)

I realized tonight the sixth gear is only for 85+ mph

The M1100 is geared way too high, grab a 14T and it will make a big difference.

This thread makes me feel better about going with a built 944 motor for my build. Although I have a feeling I'll be green with envy once Dub Luv finally finishes his FCR41>1000DS build.

Go 900s! ;D

aren't you just building that while you wait for another bike to be delivered? or am i confusing my build threads?

i seem to recall you started taking off the rearsets and then ended up stripping it down to the naked frame... [popcorn]

Not exactly but it's my thread that's confusing. I randomly posted about stripping my old 750 down to the frame and that thread accidentally became a build thread for the main bike I'm building out of all new parts that I slowly aquire as I earn the cash for them. It's the motor I'm waiting on, it's being completely rebuilt and souped up. I am also building a rat bike out of the old 750 parts but that project has stalled because all my cash goes into the "new" 900.

Just be aware that the 14 tooth front sprocket will eat your chain quickly.

While the bike shop where I purchased my 14t sprocket was happy to sell it, they also acknowledged that premature chain failure is a common result when I came back in and ordered a 16/44 setup. Kind of expensive, but I shouldn't have to buy another chain for a looooong time!

How often do you lube your chain and check the adjustment? Ducati sells a 14T you know. Most people buy a Driven. Who made yours?

How premature is premature? I have had a 14t front sprocket on my 09 1100 for about 30,000 miles and I am currently on my second chain and it currently looks ok....

Did you consider the fact that the people who told you a 14t would ruin chains "prematurely" then turned around and sold you an entire package that you admitted was expensive?

I'll take my personal experience over the advice of someone trying to sell me something!

Mark

A 14 tooth will reduce chain life.  Tighter radius.  How much?  Not enough to worry about.  Maintenance, environment and riding style will be bigger factors.  748 and 749 Ducatis came from the factory with 14 fronts.

That was kind of my point Howie, I guess I didn't say it as clearly as I had intended. Is it worth spending $$$ on sprockets to save $ on a chain?

Throw a 14t (cheap) on there and if I have to replace my chain "early" by a couple of hundred miles (or whatever), then so be it.

Mark

 

weight differences?

I've raced the s2r against the new 1200 and ended up winning, I think the weight was the main contributing factor  [beer]

 [clap]

If that pic is you then I agree. Females on bike tend to be faster in a straight line if all other factors are even close. We males tend to carry a bit more weight. Hell I have 90 lbs over my wife and on a bike that is huge. If she could ride well enough to race I think she could take me with half the power.

Exactly  [thumbsup]

lol well ya :P

But I meant bike weight lol (The Monster 1200 has over 100lbs on my bike)

The worst thing you could do to a new Bike Engine is to 'run it in'  :o.
http://www.mototuneusa.com/break_in_secrets.htm (http://www.mototuneusa.com/break_in_secrets.htm)
Just be sure to add an additional Oil Change at maximum 50 miles on the Clock.

 [popcorn]

I saved that article awhile back. Interesting.
+1 [popcorn]

Over 100 lbs, that's no good. I saw one recently and it also has a heavy cruiser looking style. Too bloody cruiser like if you ask me.

I'm curious to know how long you expect a chain to last.  I put about 12,000 miles on my first chain and only changed it because it had developed a couple tight spots due to me not cleaning/lubing it enough and the first mod I did on my bike was the 14T front sprocket.

You already are....