| Author | Message | ||
     Newfie_Buell |
I have a 98 S1 Lightning North American Model and am considering going to the European Rear Pulley. I believe this is a smaller pulley. What benefit will this be for me? | ||
| Rick_A |
Slower acceleration and higher theoretical top speed, I believe. | ||
| Ray_Maines |
Better MPG, worse speed control in a parking lot. Ever so slightly longer wheelbase means ever so slightly slower steering. More weight on the front tire means it sticks to the road ever so slightly better. What it really means is that you will have to be more careful with the clutch from each and every stop light from now until the end of time. A bigger rear pulley would be a better change. In total, it doesn't mean a thing. It's just different. | ||
| Spiderman |
how will a differnt pully change his wheelbase????? | ||
| Hootowl |
Because you'd have to move the rear wheel back slightly to tension the belt to compensate for the smaller pulley. | ||
| Ray_Maines |
A larger pulley used with the same length belt will cause the rear wheel to be pulled in towards the engine and therefore shorten the wheelbase. It’s all theoretical, really doesn’t mean a thing. | ||
| Greestlightnin |
Spiderman...A smaller rear pulley would require adjusting the rear axle out to take up the slack, assuming the original belt was retained. I don't see the change in handling characteristics being all that dramatic. Ray...I searched high and low for a larger rear pulley, couldn't find one anywhere. Did find a twenty-six tooth front at A.S.B.,very helpful folks they are. I didn't think one tooth would make much difference, but I was wrong. It was awesome getting off the barrel turns at BattleTrax. Also running noticeably higher RPM at highway speeds. | ||
| Ray_Maines |
GreeseLightning: You've got mail. Anybody else interested in a .xls gear chart? | ||
| Greestlightnin |
Ray...I'm a right coast second shifter, I'll check it out as soon as I get home tonight. | ||
| Ray_Maines |
Greese, I hate to sound like a super butt-head nag, but please fill out your profile. Thanks. Hey, I'm serious about this: A Kevlar belt means that the axle moves back and forth because of a different size pully and the wheelbase changes accordingly. A chain means you can do what you want with the wheelbase, and a drive shaft means you don't know or care about the wheelbase. For most of us none of this matters at all because we can't tell the difference anyway. Kenny Roberts can tell the difference but I'm not Kenny Roberts and the chances are, you ain't either. | ||
| Greestlightnin |
Ray...Newfie Buell wasn't asking for all the technical bulls**t we're tossing around now, he simply asked "What benefit will this be for me?"...I think Rick A gave the correct answer, as far as Newfie's concerned. No, I am no Kenny Roberts, but he was one that I admired in my younger years. Shafties lose hp to the rear wheel, kevlar has no links, chains are the the ticket. Not only do you get almost unlimited ratios, as you stated earlier, you can set your wheelbase. Once again, it would take K.R.to note any difference. By the way, did I mention my passionate hatred of Freddie Spencer? And yeah, Ray, my profile is a "works in progress"...you ol' super butt-head nag.... | ||
| Spiderman |
Yeah but were not talkin inches here. It isn't goin to be that dramatic of a change to even notice. | ||
| Blake |
Newfie, Going from a 61 tooth to a 55 tooth rear pulley will increase your overall drivetrain ratio by 10%. So instead of shifting lazily into 5th gear at 55 or 60 you will be shifting at 60 to 66 mph. Your 2nd gear, bang the rev limiter will go from around 60 mph to around 66 mph. Your wheelbase will increase by approximately 1.6 teeth on the belt. | ||
| Buellistic |
ATT: Buellers *** ie: EURO 27/55.......... *** Keep your 61 and put a 30 on in place of the 27. i have a 97S3T which still has the LIGHTING HEADS and it runs just fine. It will run faster in 4th than 5th, but with a tail wind it's BCNU! The final ratio is only tenths in the 27/55 and 30/61.. In buelling BUELLISTIC and/or Hardley-Harley | ||
| Greestlightnin |
Ray- you told Newfie "A bigger rear pulley would be a better change"...Do you know where to get one? Serious question, I've been lookin', can't find 'em. | ||
| Spiderman |
Greest, how many teeth ya want. Cause you can fit a Pully from a duece or fat boy on your bike. It is HUGE though. But when you blip the throttle LOOK OUT. | ||
| Greestlightnin |
Spiderman, do you know many teeth? Probably way too many for the 26 tooth front, but I could always put the 27 back on. Hmmm...maybe still too many. I'll look into it, thanks for the info. | ||
| Greestlightnin |
Blake...can you turn me onto the top first gear speed with a 27-70 ratio? (Spider was right, that is one BIG pulley)...Thanx... | ||
| Spiderman |
Yeah 70 teeth, that will bring your front end up faster than the Goodyear Blimp on a windy day. | ||
| Newfie_Buell |
Reading all the stuff here I picked up the Euro Gearing, large tank and a carbon fiber rear fender for about $250.00 Canadian. Couldn't pass up the deal. I think I will put the larger rear pulley on and see what it does, with something as torquey as what we drive I can't imagine the acceleration being much of a difference. | ||
| Firemanjim |
You can always put on the 29tooth front from an S-2 if you want to get a middle ground.I had the 27 front and the 55 rear on the Bonneville bike with the 6 speed and it pulled 165 on the salt.Is that enough top end for you.Have not had it back on the street so I can't say how it does on pavement,but should have it back in S-2 guise in a couple of days. Newfie Buell,you picked up a Euro rear and are talking about putting on a larger rear--the euro is the smaller rear gear so if thats the one you mean you will lose acceleration. | ||
| Redstripe |
Hey Guys, Concerning this topic, as already mentioned in the "secondary drive"-part of the knowledge vault; The x1's swinger can't combine a 55 teeth rear-pulley with a 27 teeth front, You'll run out of adjustment... In case anyone was pondering over it... Jilles. | ||
| Firemanjim |
Jilles,pretty much the same on the older swingarm also,swingarm has enough adjustment --barely,but the axle adjusters hit.Remember,Peter and Griz made me some spacers for the S-2. | ||
| Stormfool |
Any braniacs able to provide a calculated topspeed for the 28 tooth front and stock rear stock five speed (X1)? Just looking for a few more MPH | ||
| Peter |
Jim, Actually it was Griz and Paul that made those for you. I just watched. Funny thing about that Euro rear, I ran the 27/55 combo on my M2 for a while, and still had some adjustment left. PPiA | ||
| Hans |
Hi Peter, Did you realize that, when you want to tie a rope firmly around the earth and you would want now that rope fixed on poles of one yard length that you will need no more than 6.28 yards of extra rope? An extra tooth makes a very small difference in the distance of the center of the sprockets. Hans | ||
| Spiderman |
But compared to the Thousands of miles the Earth is 6.28 yards is Verrrrrry small.  | ||
| Blake |
Stormfool, The stock domestic drivetrain has a top gear theoretical top speed of ~140 mph, so going up to a 28 tooth front sprocket from the stock 27 tooth sprocket would result in a 28/27(140mph)=145mph.  Just multiply 140 mph by the ratio of the new to old (new/old) front sprockets. If looking at the rear sprocket, multiply 140 mph by the ratio of the old to new (old/new) rear sprockets. | ||
| Hans |
For each tooth more or less on a sprocket you have to adjust the rear axle over a distance of (roughly) 1/4 of the distance between two teeth: Best measured on the flat part of the belt. Hans | ||
| Stormfool |
Thanks--I'll file that in my mental junk drawer of essential formulas-- On the heiniedyno would the bike seem more sluggish or no real difference in round town riding? I'm considering the swap--a little lower cruising RPM could be a good thing--if pulling off from a light still feels about the same... Appreciate the response | ||
| Newfie_Buell |
I just love this board!!!! Where else could I ask such a simple question and get so many different explanations all giving me the same answer. Please don't change anything here. Think I will try the smaller rear pulley and adjust the belt accordingly. | ||
| Colin |
I know I've come in late here, but I've got a bike I love and never miss an opportunity to bore everyone else rigid with it. I'm a Eurobueller and took the opposite route by ditching the Euro rear pulley for a USA spec. The results are a useable 5th gear - prior to the change the bike (99 M2 Cyclone) barely topped 105 mph in 5th. If I wanted to go quicker, I had to change down to 4th. It also means 3rd gear is now valid around town giving more flexibility at lower speeds. The trade-off in terms of increased fuel consumption is barely noticable and well worth the increase in fun - which is the only reason I've still got the bike. I know that the USA spec drive pulley is also different to the Euro version and appreciate that the effects of the change you propose will vary because of it. Either way, will you let us know how you get on? |
