| Author | Message | ||
     Baggermike |
I have had many bike over the years that I would really need to think about how many I really have owned. Some one posted about all the bike should be the same and I have found this untrue. Has anyone heard of when a car is built it depends on what day it was built on for being built good. Like a Monday car would not be good because everyone has a hangover from partying on the week end and Friday is not good because the people are thinking about partying for the weekend, and Wednesday is the best time to have your car built on. I have had two bikes of the same model and year, the first one was a xl 600 and rolling along in first gear with the clutch out and all my weight up front I would nail the throttle and if I did not let off I would have flipped the bike. Now I bought another one of the same year and model and it would not do it, so there was a definite loss of power, same bike, same year, not the same power. I also had two Harley 1982 XLX sportsters and one got way better gas mileage than the other. So my point is that it depends on either how you break the engine in or how it is put together at the factory. I can not explain this any other way but there were differences between two bikes of the same year and model. So I have been reading all these post and have seen some have problems and some do not, or have different problems and some are real good and have no problems. I would expect to find small differences in power on a dyno for each bike to and would be because of the way it was built or broken in. Before buying this bike I knew there might be some small problems, I also researched how to break in a motor from many online articles and then with all that info that I got and figured out what I thought was right and did it. I planned on keeping this bike for a long time so I wanted to do every thing possible to have a very good running bike for yeas to come, and I changed the oil at between 40 and 50 miles, this made thence to me, and it would not hurt the bike, so why not do it, so I changed my oil at 45, 200, 600, and 1000 miles and switch to synthetic oil at 1000, miles, I also read that the first 50 is the most important so I did a 15 minute ride then let it cool down and did this four times and varied the engine speed, went through the gears, down shifting, accelerating and power. I now have a motor that runs incredible. I have read post were the bike does not do good at low rpms and mine does, so is it luck? or the day it was built on? or how I broke it in the engine? Just something to think about. Mike | ||
| Nicozzzz |
I get 2 xb 12 S model booth build in 2003 . in the first the engine push a 20% more than the second in same configuration . the second stay on the road little bit better with the same suspension configuration and same tyres | ||
| Ducxl |
I have read post were the bike does not do good at low rpms and mine does, so is it luck? I believe we're back to the discussion about "oversquare" versus "undersquare" twins. That's the difference Mike. Here,check this link out Stroke Ratio. When i was a kid,the Chevy 302ci engine was an absolute SCREAMER of an engine while the(longer stroke/undersquare)307ci engine was a dog (Message edited by ducxl on February 27, 2008) | ||
| Bigblock |
307 is a debored 327. Some of em ran out pretty good, but some sure were dogs. | ||
| Bdutro |
You can't make many blanket statements about oversquare vs. undersquare engines. The SV650s'are undersquare, but the key is that the port volumes and valve events are appropriately sized. Great engine. You can fit more valve area in an over square engine, and it's important to remember that air flows around, not through the valve. One interesting fact : The piston's peak linear speed in an F1 engine turning 19,000+ RPM and a recent model Corvette at 6000+ RPM are almost the same. As long as the rest of the engine is designed about the same specs, it comes down to what the application and preferences are. The Helicon looks magnificent to me. | ||
| Baggermike |
I think you guys got off topic. I was comparing 1125R's to 1125R's not one type of bike against another. I have had many bikes and two of a kind. so I was comparing apples to apples not oranges to apples. the same bikes both new and both different. and my point was that one guys 1125R might perform different than another guys 1125R do to break in or how it was assembled, but the same bikes. Mike | ||
| Blake |
I followed your point perfectly Mike. I agree. I'd assign most of the difference to imperfect tuning and also to the imperfect/varying range of geometry due to the tolerances of various key parts like pistons and heads and cylinders. It sure won't hurt to change the oil as you describe, but cheese man. I'm lazy!  | ||
| Jos51700 |
Looking back at your XLX's, it doesn't surprise me. The quality, factory tolerances, material variance, etc (In a nutshell, quality control), was horrendous at the time. I'm sure there are going to be differences in 1125R's, but I think those differences will be significantly less. Machining, tolerance, and materials are far ahead of what they were even ten years ago. The Monday vs Friday build chart never made much sense to me, because partiers tend to do shitwork no matter what day of the week it is (In my opinion), but I know HD quality dropped off right before the strike a couple of years ago (again, ditto that for mid-to-late '70's quality control). I'd like to scientific data on engine break-in before agreeing one way is better than another. To each his own, I guess. | ||
| Baggermike |
I agree Josh and would like real data on break in. I searched the web and then thought about everything I read and took what made thence and than applied that to my bike. I would like to see a few 1125's run on a dyno all the same time and see if they put out all the same power. Mike |
