| Author | Message | ||
     Ntm98s2 |
Why go to all trouble to tear out the motor to go up 50CC? Does it make that big of a difference power wise? Please pardon my ignorance on the matter. | ||
| Guell |
Im going to do it when i have my motor apart for upgrades, cant hurt to freshen everything up | ||
| Cyclonemduece |
dollar per dollar without machine work being done to the case to yeild a bigger cylinder, yes it is popular and proven performance mod. | ||
| Buellsrule |
1250 kit alone will give you a 5% increase in power all through the rpm range. If your bike was making 100RWHP then it would make 105. That's pretty good for the money. It's also very easy to do. | ||
| Preybird1 |
If just doing the top end and want a little over stock 1250cc is the way. The main reason most people are using them is that they do not have to roll out the motor and split the cases. That is much more work than an easy upper motor job, I can have both heads and juggs off in under an hour. Also if you go to big with the fuel injection still on the bike they kind of start fighting and it will be a waste of money! | ||
| Tripp |
i melted a piston a little over 10k ago and replaced oem with 1250 kit incl. race pistons and my butt dyno tells me my m2 is much faster, i think the bump to 10.5 in compression has a little to do with it too, not just the increase in displacement! | ||
| The_italian_job |
so you guys are talking about just put the new Cylinders? | ||
| Tripp |
pistons too! | ||
| Pkforbes87 |
From what I've seen, the 1250 kit is most common when top end damage has occurred and the jugs and/or pistons need to be replaced anyway. (although I'm sure some do it to perfectly intact stock engines) The 1250 kit I opted for is also built with sleeves unlike stock cylinders, and like Tripp mentioned, comes with higher compression pistons. NRHS also advertises that the 1250 kit cylinders are a more rigid construction that will resist slight changes in "roundness" in the front cylinder caused by the way tuber motors are mounted in the frame. | ||
| Loki |
For me part of the equation was the economics of it. Looking at the cost of the various items to do a rebore. The 1250 kit was not much of a leap. Couple that modest bore increase with the compression ratio increase. Equals a good bang for the $$ spent. Now top that with some head work and really wake things up. | ||
| Loki |
The 1250 kit does not require you strip the motor out of the frame either. Minimizes down time. Look at it this way. Would you like to pull a set of cylinders. Take them to a shop. Wait for the shop to do their work. Go back to the shop and pick up your parts. Then start the reinstall. or Order a 1250 kit. Fit the pistons and rings(I opted to have the originator fit them for me). Walk out to the bike and start the required tear down. Remove the cylinders and pistons. Drop the new set on and do the reassembly. Really turns into a one day job with the 1250 kit. | ||
| Firemanjim |
Not to mention things like no more cast iron liners in the cylinders to shift on you,2 different alloys fighting each other during warm-up, lighter cylinders, and better sealing from cylinders that are actually round.  In a tube frame Buell this is such an easy job why not do it!!! | ||
| Gunut75 |
The compression bump is one of the best mods I've seen (provided the fueling is correct). A buddy of mine (and I may get damned for this) took his 80" stock Harley motor, put in a kit for higher compression, and the difference is night and day. I'm not sure what was modified, I think it was a minor porting job, and decking of the heads. The cylinders stayed the same. That bike is SERIOUSLY fast now. hmmmmmm.......too bad its a softail, and not a Buell!...........BUT ITS REALLY FAST IN A STRAIGHT LINE.....HAHA! | ||
| Micromachine |
no replacement for cubic displacement | ||
| Easy_rider |
Say suppose your engine is sitting on a pair of jacks in the garage, you have no idea regarding the condition of the motor, and you're in danger of going over budget. Is a 1250 going to be enough? Will I regret not waiting for funds for an 88? FWIW, I'm not all that worried about top end. Just want the power there when I roll on from about 2200 RPM. | ||
| Pkforbes87 |
I've never ridden an 88" but Cycle Connection in Joplin, MO had an 80" XB12SS that I took an amazing demo ride on. From what I gathered the headwork was minimal as well as stock cams. The airbox and exhaust were stock as well. (I assume a dealer can't sell a new bike that no longer meets all EPA and noise regs?) The 80" definitely had more skedaddle than a stock motor but it felt like there was so much untapped potential. I'm anxious to get my 1250 motor together to see if it's anywhere close to the feeling of the 80". "Will I regret not waiting for funds for an 88?" I think the big reason more people don't dwell too long on your decision is that case boring adds to the total project cost, time that the bike is down, and how much work is required to get it all done. a 1250 seemed like a relatively cheap upgrade (I already needed 1 cylinder, piston, and head) and provide a good starting point for future mods. For now I can enjoy the benefits of an extra 50cc as well as higher compression, then after it's broken in I can easily upgrade cams, valvetrain, and get headwork - All building on stock cases. | ||
| Limitedx1 |
the if your tearing the bike down or doing a big rebuild, the price difference between a 1250 and an 88 is the case boring, give your buddy at shop a case of beer and bingo..... | ||
| Easy_rider |
I'm looking at the bottom of the line $700 kit if I'd go for a 1250. The 88 kit starts at $1100. Looking closer, none of the 88 kits have the highlighted fins that I'm fond of, and they have a big, ugly Axtell stamping on the side. Nothin' against them, just don't like the look. The heads become a question as well at that point. I need to look at what XB heads look like on an S2. If I'm not careful, I may end up having to sell an S3 to do all that I want to an S2! | ||
| Buellsrule |
My 88" kit without cylinders is up for sale on ebay. Pistons are brand new. Rods are used but excellent. All you need is to get some cylinders from Revolution Performance and you're good to go. Here's the auction link: http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?Vi ewItem&item=160326993197&sspagename=STRK%3AMESELX% 3AIT&viewitem= | ||
| Limitedx1 |
if i would have had the cash in my hand at the time i was quoted 800 for a 90" kit and couldnt buy it because the money wasnt in my hand....... what another 2 or 3 hundred bucks for a boat load more horses at that point.... | ||
| Brinnutz |
limited, you gotta figure in the case boring, the time taken to remove and split the cases. 1250 is what I'm going to do, along with XB heads and a billet mount that I'll probably have made locally, I'm hoping anyways. | ||
| Easy_rider |
Do me a favor -- make sure your tail light is nice and bright so I don't have trouble finding you if I make it out this summer!!! | ||
| Limitedx1 |
http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?Vi ewItem&item=180345916148&sspagename=STRK%3AMEWAX%3 AIT&viewitem= probably shouldnt have posted this, but if somebody doesnt buy this im going to pull the trigger and stomp all over 1250's | ||
| Limitedx1 |
Bri, your bike is all the way torn completely apart right? so take one night and take the engine apart and send it to a shop to get machined..cost vs time=by the time you get it back together i think your would be glad...your bike has a carb too so you dont even need to worry about ddfi tuning. | ||
| Brinnutz |
I'm not going to be able to afford any engine work this year. I'm going to get to work on her next week finally I hope, and get the tranny done, slap in some X1 cams hopefully (if I can find them). But I'm going to have to wait on a shipment from the UK here soon, if I jump on this pretty good deal I found for something that's merely cosmetic, but awesome at the same time. That's going to be a secret, LOL. | ||
| Preybird1 |
I am getting my motor done in 2 weeks by a non-sponsor so i can't say who, But i decided on the 1250 kit big bore stage 2 light XB heads, hurricane valves 7mm w/max head size,springs,locks,And some SE.536 cams, Also i am having them go through the tranny and re-build and freshen up possibly back cutting the gears and installing my muller power clutch while they are in there and installing the new oil pump with the new upgraded oil pump drive gear. I am going to load up my bike and drive it up to colorado 570 mile each way and drop it off and have them build it all for me, There estimate was far lower than the HD dealer here in town and i can use the extra cash for the gas money to get the bike up there. When i am done i will have parts for sale here is a small list {all used} off an 01 x1 1.front head needs a new valve installed but in good condition 2.both cylinder jugs rear needs to be honed or bored to removed damage from valve dropping in 3.front motor mount (stock) 4.2 injectors 5.1 fuel rail (bent) but still works 6.possible xb rocker conversion dont know just yet if i need it 7.front piston I am going all out this time and getting the bike done by the person(s) who manufacture and machine the parts and engine kit, What better way than to have the guys that do this all day long and built all the parts do the installing and tuning. Anything left over will be sold to recoup the money spent in the rebuild EDIT: hey brinnutz your in luck i will have a set of cams coming out of my bike that are in awesome shape and have 9,500 miles on em if you want em let me know i will make you a good deal!! (Message edited by preybird1 on April 16, 2009) | ||
| Phelan |
Russ, Brinnutz already has X1 cams sittn' around. I need some for my S2 though, so save 'em for me. And the guy you're talking about is a good friend of mine; been doin' business with him almost exclusively (when I need it NEW) for about 3 years now. | ||
| Brinnutz |
No, I don't have any cams!! Lemme see what your offer is. =) How soon can I get them? I'm not getting the 1250 done this year...or the XB heads installed either (Just got those yesterday). Going to have to wait until next year I guess. (Message edited by brinnutz on April 16, 2009) | ||
| Micromachine |
preybird1, ill take the xb rockerboxes if you dont need them, let me know | ||
| Buellsrule |
Backup on the XB stuff and Dan and Dan do good work. |
