Guess the seat fits with her trousers :naughty:Quote:
Originally Posted by Steve_Halt
Printable View
Guess the seat fits with her trousers :naughty:Quote:
Originally Posted by Steve_Halt
Or his.Quote:
Originally Posted by tomtom
Oh yeah, the skinny ones :lol8:Quote:
Originally Posted by Steve_Halt
Maybe he owns these too ??? :mwink:
Attachment 7348
Attachment 7349
Attachment 7350
Attachment 7352
OK, this is something different ;-)
Attachment 7351
More from "Nice sounds, look ???" - hope it does not become boring ;-)
http://v.youku.com/v_show/id_XMzczMTE0OTg4.html - it shows clearly, that the cat-conv IS removed...;(
http://v.youku.com/v_show/id_XMzg5MjgwMTY0.html - terrible video quality, but at least "the look" (of the silencer) is not bad (imho)
Wow, I doubt that pipe is going to clear the rear wheel.
Probably not.
The original design is thinner on purpose.
Tomtom, why is removing the cat a bad idea? I've seen several rebel raptors with this mod and a Suzuki gz150. I thought less restriction in the exhaust flow was a good thing.
Nuhaus, I hope Tomtom will respond with his thoughts. I've tried these mods on smaller bikes and really they make little difference except for the sound. A motorcycle engine is in many ways like an air pump there's not much point in having a fast exit for exhaust gases if the way in is as slow as ever, I've tried just putting on a straight-thru muffler, but I think it was a mistake. I've tried removing the air-box and putting on a clip-on fliter which helps the bike suck air in but really if the EFI or carb do not allow a better fuel mix you'll just end up making the bike more lean, sometimes if you have a cheapo Chinese carb bike you can fairly easily raise the needle height or put in a bigger jet and then get a tad more horses maybe half a one, but I don't know if I'd bother trying to second guess Italian or Japanese EFI tech design without a dyno. Obviously with some racing bikes they have open-mouthed after market mufflers, however these are generally tailored to each bike specifically and have been tested usually giving extra power at the sacrifice of some torque. IMHO, and I'm no expert but those baffles, spacers and the cat is in the muffler because it is a street bike to give you back-pressure to keep the torque which makes the bike more usable for a real world non-racing situation and obviously more environmentally friendly too. I for one wouldn't want an inline 600 on the road that was sluggish in the mid range torque band but was marginally more powerful around the red-line.
Thank you for the thoughtful response. I have looked on a few boards at different ideas concerning exhaust systems on bikes and there seems to be a wide range of opinion on removing the catalytic converter. In my own experience with scooters, I've noticed that making the intake and exhaust ports more open produced a noticeable increase in power. On my Suzuki qs150a, I modded the airbox and muffler in a similar manner and again, more power. However, when I tried the same trick on a Honda Rebel it was a disaster. My CB400 on the other hand had a modded exhaust and runs remarkably well. Xiao Cui and 998S were both impressed with it when they rode it, and its new owner so far has no complaints. :)
With a bike like the Benelli, however, the addition of EFI would seem to make things more difficult. I'd really like to see some dyno results from the mods people are doing with them. For now though it looks more like the "snakeskin seat" style of mod.
I thought so too. Looks more like snakeskin than leopard skin.Quote:
Originally Posted by Nuhaus
ZMC888; When was the last time you saw a leopard? :lol8:
Nuhaus I'd like to think that anyone riding an inline 600cc bike in China wouldn't really need a tad more power at least on the road, which really means it's all been done for show, plus you illegalize the annual compulsory testing after the bike is 2 years old. Leopard-skin, snake-skin, whatever it's all freaking poor taste. Sometimes motorcycle customization seems to me more like desecration. :rolleyes1:
The remarks from ZMC888 are spot on.
With newer, EFI equipped bikes, it is a mission impossible to get better curves without running it on the dyno for several sessions.
And even then, only a slip-on will hardly do anything for increasing power.
Basically, the additional power from changing to a more open pipe is only in your mind.
The louder or deeper sound seems to make it faster, but actually it is not, just a little mind game.
We picked up a Ducati last weekend, still fitted with an original (quiet) factory exhaust.
It's output is identical to mine, but I guarantee you that riding it is not half the excitement of an open system, and hence it feels very very slow.....
That Benelli certainly deserves a more open system, but don't expect it to become stronger.
On a sidenote, adding just open pipes will not do much harm at the bike, other then that if will backfire a bit more on deceleration.
Nothing to worry about.
Not sure if I said it is a bad idea, however, the cat has the function to clean the exhaust emission, and no cat means more toxic emission (see also: http://en.wikipedia.org/wiki/Catalysator), and I would name that bad, indeed.Quote:
Originally Posted by Nuhaus
On a side note if I had a Benelli I think I might keep it stock at least for the first few years then after that put on a more open pipe, the thinking is that the pipe is restrictive but only in the sense of bumping up the torque, however I think after a few years do a fairly reversible muffler mod, this is because stock mufflers these days must have some pretty small apertures inside the cat and baffles and spacers therefore after a few years the carbon deposits might start to restrict the bike a bit.
I agree, it will be quite difficult to get more horse power by only exchanging the pipes. But if one wants it faster, changing the sprocket would do the job surely. Downside would be lower top-speed, but on Chinese streets that should not be a major concern, I guess :mwink:Quote:
Originally Posted by 998S
The sounds of the different replacement pipes are nice--some more, some less. However, I like the more high-pitched original sound. To me it sounds very aggressive and powerful--simply thrilling--and I find this sound fits with the sport-style design and with the mid-sized 4-zylinder-inline engine.
Contrary, a deeper sound would fit a touring bike or a big 1-zylinder bike better, just mho... Nevertheless, to judge from a video does not make much sense--live is the only feasible option.
Had the full Termi DUC MTS1200S system installed 1 month ago (stainless / Ti system, race ECU, air-filter). Seems slightly rich, but goes like stink... Awesome sound - the way it should be and the removed CAT "bread-box" weights 6.2kg......Quote:
Originally Posted by 998S
Guess we need a new forum "Race"--or do you talk "street" here???Quote:
Originally Posted by TB-Racing
Agree. As some of you know a bunch of us have put the Laser cans on our JH600s.Quote:
Originally Posted by 998S
Result: They've turned the sewing machines into motorcycles, but I am not sure if there's any real performance enhancement.
Was riding with Milton on the identical JH600 and Barry who has the older version (neither have "upgraded" the exhaust), and the 3 bikes are very similar thru the gears - noted only by riding with each other, no dyno used here as well.
It should also be pointed out that there are some people here on this form who have this issue with the color of the bike.
For instance I know a guy who thinks he obtains additional power from the the bike being BLUE, but this is only in your mind (as 998S says: it's a mind game).
There are several of us who KNOW the blue faster!
Attachment 7437Attachment 7438
Yeah! I agree, no red near by--have to be far away, still...:clap:Quote:
Originally Posted by TexasAggie
Went to their shop in HuJu Road (Nanjing) again and saw a batch of new bikes there. Must be the next product run. The no-brand brakes (Brembo-like ones) are branded "Benelli" now.
Here is it series of photos about replacing the exhaust system:Quote:
Originally Posted by ZMC888
http://www.motorfans.com.cn/bbs/t_17344398.htm
I found his brother!!!:lol8::naughty:Quote:
Originally Posted by Steve_Halt
Attachment 7635
Yes, and here are some pics:Quote:
Originally Posted by Steve_Halt
Attachment 7636Attachment 7637
Well regardless if there's any more power from those pipes, they look and sound way better, plus it can't hurt to lose all those kilos!
Actually not a very expensive mod, only 1700 on taobao:
http://item.taobao.com/item.htm?id=15147791564
its already known that the benelli is a Yamaha R6 derived engine therefore a full system for a R6 will bolt on nicely and being underslung and body hugging you could have saddlebags no with no worries of it over heating, i saw the post where it said should dyno it but just putting it on a dyno just tells you the power at the crank and rear wheel it would require a remap since its a Fi bike to gain more with a race exhaust on, but remapping you accomodate the lack of back pressure with more fueling or more air to keep the torque in the sweet spot midrange and map it for a increase in power in the top end as well. fuel injected bikes suffer if not mapped properly where as carb bikes the lack of back pressure causes more suction into the cylinder for fuel meaning even running with a cat on a carb bike it will be better suited but a jetting will still be better especially as most carb bikes are set up stupidly lean now to pass regulations
i run a cat free race exhaust on my bike with no db killer. my fathers bike also runs a cat free full system and has been remapped a increase of torque by 6% throughout the ranfe and a increase of 5.5bhp
Kennon
Another option:Quote:
Originally Posted by felix
Attachment 7640
Heard (on www.motorfans.com.cn) about some problems with the spark plugs - it was recommended to use (imported) NGK Iridium CR9EIX, of which a set of four costs ~1,000( (I guess the set of 4 for ~120Y @ taobao are fakes).
Also some rumors about (very) dirty oil, even already after 500km, with lots of metal at the magnetic oil-screw.
I will search for and post the exact links, if needed. However, anybody experienced or can confirm these problems?
Quote:
Originally Posted by tomtom
For my bike, the manual recommends doing the first oil change after 1000km but ZMC888 advised me to do it around 100km (The metallic shards are to be expected since it is a brand new engine), then the second at 1000km.
ZMC888: Correct me if I remembered any of that incorrectly.
Quite a leap to jump from a rumour that the Benelli uses an old R6 engine to believing that the bike can be plugged in to Kawa diagnostics and remapped and that it will take a whole Kawa exhaust system. Also I was commenting on a Chinese exhaust system where the pipe was hacked and a candleabra that looked like it was solen from a Synagogue was welded on = power or torque boost unlikely.Quote:
Originally Posted by Kennon
Pete, read that thing about early oil change just in case of factory oil shavings is probably uncessary on most bikes, but a worthwhile insurance policy with any China bike.
Quote:
Originally Posted by ZMC888
That's exactly the point. One should trust and follow the factories recommendations. Firstly, they should know best. Secondly, any additional oil change is costly and waste if not necessary. So far the "pure tenet"...:naughty:
What worries me is that Benelli Q.J. recommends first oil change at 1,000km, while after 500km (maybe earlier?) a metall-mud is collected at the magnetic oil-screw (and oil is totally black too, for sure). Question is if this oil-mud would harm the engine or if it is normal (and hence acceptable). I am not an expert here...
But I know that clean oil is a life insurance for an engine and it might well worth the extra cost to exchange oil (and filter) more often than recommended by the factory.
Would be great if somebody with experience and knowledge could "enlighten" me (us?) :icon10: