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Post by fletche36 on Feb 19, 2024 17:58:49 GMT 1
Ok, i have just fitted a set of these as i was curious as to how my bike , a 4l1, would ride with these on as compared to any other pipes. First observations before fitting were that they are around 6" shorter than the swarbricks that they may replace and that the build quality is very good and comparable to the swarbs. However on fitting i notice that they are very close to the swing arm and there is actually a witness mark where previously the swing arm bolt must have touched the can. only very minor but its there. is this closeness normal? The bolt is in the right way too and left side pipe is also very close, you can just about see daylight between pipe and swinger. Second thing is the noise..... feck me they are loud! The swarbs are positively stealth in comparison and i think tomorrow ill repack the silencers to see if that helps any but i doubt i could live with that noise.Performance wise ( i went back to std jetting ) they felt ok with the power being slightly down on the swarbs until around 5k when it really does come in but they sign off earlier than the swarbs which is i suppose the purpose of midrange pipes. Obviously this is only a seat of the pants dyno test and ill do a few more rides before i make a decision on which set to keep. Aesthetically both sets look good so i couldnt fault either there and both are very light so weather permitting ill get some real world miles in and see whats what.
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Post by fletche36 on Feb 19, 2024 18:21:01 GMT 1
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Post by fletche36 on Feb 19, 2024 18:22:04 GMT 1
might have exagerated a little when i said 6".
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Post by fletche36 on Feb 19, 2024 18:22:48 GMT 1
Alonze, for an lc.
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Post by abar121 on Feb 19, 2024 18:28:21 GMT 1
Sorry, could see from the photos so I delete the post.
I have some TSA midrange pipes, not tried them as yet.
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Post by beardy on Feb 19, 2024 18:54:18 GMT 1
I have the early crossovers and yes, they are loud. A friend has the later non crossover version and they are louder. I’ve only just had the silencers off to repack them. I was surprised how tight the wadding was, so I’ve repacked them looser to see if it makes them quieter? I’ll update when I go out next. I’ve got a metmachek swinging arm and rearsets and have had to space the rearsets out from the frame so the axle nut doesn’t whack the silencer.
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Post by muttsnuts on Feb 19, 2024 20:18:31 GMT 1
clearance on the swinging arm comes down to a number of things including what the rear shocker is, on a stock bike with a good shocker they do not hit the swinging arm, they are clear by a good margin, if you have a lowered rear end, a different shocker etc, then this all plays into the clearance one way or another
HTH
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Post by fletche36 on Feb 19, 2024 20:52:44 GMT 1
clearance on the swinging arm comes down to a number of things including what the rear shocker is, on a stock bike with a good shocker they do not hit the swinging arm, they are clear by a good margin, if you have a lowered rear end, a different shocker etc, then this all plays into the clearance one way or another HTH its running a yss so its probably 5 mm longer. As long as its not actually touching and not going to do its no drama. i may just tweak the brackets a mm or so just for peace of mind. They do look good on the bike, kind of meaty looking. |
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Post by fletche36 on Feb 20, 2024 14:00:55 GMT 1
pics
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Post by fletche36 on Feb 20, 2024 14:03:11 GMT 1
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Post by fletche36 on Feb 20, 2024 14:16:22 GMT 1
Nothing to chose from looks wise, if anything the midrangers look slightly chunkier and possibly suit the bike better. Anyway, i have just done 15 miles with a little bit of town and some good b roads to dial into the ride, now bear in mind im less than 100 miles into a new crank and pistons so im not giving the bike death. Its genuinely loud, to the point that people stopped to look and see what was coming ( ace when you were 17, but not so much now).The way it hits the power does become addictive and temps you into riding a bit like a young un but its not far off the delivery of the other pipes which just seem a slightly smoother and more mellow version, kind of like everything is happening just a bit faster on these pipes.I had to scratch the itch hence buying these and at £430 im not going to lose should i come to move them on but i really do have a dilemma now about which ones to keep. Im pretty sure these ones arent doing my tinnitus any good but they did put a smile on my face.As they say " first world problems"  |
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Post by midlifecrisisrd on Feb 20, 2024 14:30:14 GMT 1
Going in your findings I have 2 thoughts here
Firstly the Swarbricks must be "road" pipes
Secondly (if I'm getting this right) yours is a 250
I'd expect midrange 350 pipes on a 250 would make them a compromise between midrange and top end pipes
Bit like putting 250 pipes on a 350 gives more mid but less top and vice xersa 350 pipes on a 250
The noise difference may be down to packing or more likely the swarbrick silencers are longer
Steve
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Post by fletche36 on Feb 20, 2024 14:56:05 GMT 1
Going in your findings I have 2 thoughts here Firstly the Swarbricks must be "road" pipes Secondly (if I'm getting this right) yours is a 250 I'd expect midrange 350 pipes on a 250 would make them a compromise between midrange and top end pipes Bit like putting 250 pipes on a 350 gives more mid but less top and vice xersa 350 pipes on a 250 The noise difference may be down to packing or more likely the swarbrick silencers are longer Steve Absolutely spot on with everything you say.I did my homework before opting for the swarbricks and knew that their race pipes werent for me but the road ones definitely are. i think neither maker does a dedicated 250 pipe, just a generic one that does both 250 and 350 and now im going into the garage again to check on the packing. whilst having lunch i have kind of decided that if i can get the Alonze ones considerably quieter ill keep them on but if not ill default back to the bricks.Its not all about power or anything like that as i could go the 350 / 370 route but i like what i have to be as good as it can be and i always did have a soft spot for smaller engine bikes.Swapping pipes back and forth is no drama as its a 20 min job each time , its the rejetting for the bricks that is a pain . |
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Post by midlifecrisisrd on Feb 20, 2024 17:37:31 GMT 1
I've got 2 x 250 ypvs engines to build. As you say I quite liked the character of the smaller engine
Very revvy and fun thrashing without doing daft speed
I had similar pipe concerns so have a pair of 51L 250 pipes for one and I've ordered a pair of K2 tec pipes from Japan which are supposed to be the opposite, made for 250 but will work on 350
Steve
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Post by fletche36 on Feb 20, 2024 17:53:33 GMT 1
just whipped a baffle out to check the packing and its actually in good condition and not full of oil so i havent changed it, just left it as is. i guess the noise is the nature of the pipe so im back to making my decision.
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Post by muttsnuts on Feb 20, 2024 20:11:04 GMT 1
if you went down the 370 route the mid range pipes are awesome with that setup, so something to think about longer term maybe
I've just about got my resleeving operation sorted, few more tweaks and then I'll be ready to do some tests on machining and running some resleeved barrels, so hopefully not too long before I can do the 370 conversions as well
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Post by beardy on Feb 20, 2024 21:56:32 GMT 1
just whipped a baffle out to check the packing and its actually in good condition and not full of oil so i havent changed it, just left it as is. i guess the noise is the nature of the pipe so im back to making my decision. Today I started up my LC with the newly re packed but slightly looser packing than what was originally in it. It sounded exactly the same. So I guess they are loud pipes. But I do love the noise 👍🏻 |
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dex46
Thrash Merchant
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Post by dex46 on Feb 20, 2024 22:40:50 GMT 1
if you went down the 370 route the mid range pipes are awesome with that setup, so something to think about longer term maybe I've just about got my resleeving operation sorted, few more tweaks and then I'll be ready to do some tests on machining and running some resleeved barrels, so hopefully not too long before I can do the 370 conversions as well I’ve got a 250 top end ready and waiting for you 👍👍 |
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Post by liffy16 on Feb 21, 2024 14:33:47 GMT 1
if you went down the 370 route the mid range pipes are awesome with that setup, so something to think about longer term maybe I've just about got my resleeving operation sorted, few more tweaks and then I'll be ready to do some tests on machining and running some resleeved barrels, so hopefully not too long before I can do the 370 conversions as well I’ve got a 250 top end ready and waiting for you 👍👍 +1 mutts looking forward to the 370 conversion got some 250 barrels arriving soon 👍 |
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Post by abar121 on Feb 21, 2024 16:43:35 GMT 1
I’ve got a 250 top end ready and waiting for you 👍👍 +1 mutts looking forward to the 370 conversion got some 250 barrels arriving soon 👍 +2, I have a top end ready to be sent to Mutts too. |
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dex46
Thrash Merchant
Posts: 380
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Post by dex46 on Feb 21, 2024 17:04:29 GMT 1
Looking like Mr W going to be a busy boy 😊
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Post by muttsnuts on Feb 21, 2024 19:54:53 GMT 1
just ordered some sleeves for the YPVS re-sleeves, next will be the LC ones......just got to finalise a few things
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Post by dougw on Feb 22, 2024 10:38:43 GMT 1
if you went down the 370 route the mid range pipes are awesome with that setup, so something to think about longer term maybe I've just about got my resleeving operation sorted, few more tweaks and then I'll be ready to do some tests on machining and running some resleeved barrels, so hopefully not too long before I can do the 370 conversions as well That`s some more money you are going to cost me Dave, had a set of 250 barrels for a while meaning to get them to Fahron , his time scales having put me off a bit. ( Coupled with the distractions of too many other project bikes, and racing before ageing and infirmity puts a stop to it.) The porting on my current "Daily Ride" 4L0 is a bit extreme and peaky, a mildly tuned 370 set up would go down nicely. |
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