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Post by twostroker on Aug 10, 2008 11:38:22 GMT 1
ive been thinking of wrapping the front half of my swarbrick pipe on my 125lc as it gets pretty dam hot in thinking that as the rad is directly above the exhaust it is getting heat soaked from the exhaust thus heating the rad up where as if the pipe was wrapped my rad should be more efficiant. i cant see any down sides to usingheat wrap,has any one else used it before? ive seen it used on a few 125cc gp bikes  ps my bike has a tuned bigbore top end so it will naturaly run slightly hotter. |
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Post by spondonchris on Aug 10, 2008 12:53:17 GMT 1
Should be fine.
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Post by Norbo on Aug 10, 2008 13:24:40 GMT 1
I have it on some pipes i have fitted to an lc . its good stuff go for it . you have nothing to lose
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Post by carlos on Aug 10, 2008 20:17:00 GMT 1
Have you done a plug chop to see if the mixture's right as this is more likely to cause the engine to run hot rather than the heat from the exhaust passing to the radiator?
Is there any issue about not getting rid of the heat which you are going to trap in the exhaust?
It may make the engine run hotter still?
The air that passes through the radiator will cool it as long as the bike is moving, and this should also move the heat from the exhaust away from it!
What kind of condition is the radiator in? If it has loads of bent fins that the air can't get to, this may have a bigger impact?
Have you considered a cooling fan? You could control this, and switich it on, especially in traffic, or if you're thrashing it?
Just a few thoughts for you!!
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Post by twostroker on Aug 11, 2008 7:03:50 GMT 1
my red is a1 condition (its been in a box of spares for 20 years so it had verl little use,its not the heat staying in the exhaust that worried me its if the inside of the exhaust gets hotter it may well transfur the heat back to the barrel and ruin my piston. it runs 1/2 on guage normaly its just after 30 mins and a long thrash it runs 3/4 even when doing 60mph  idealy id like a dog rough micron just to see how my bike runs and performs, |
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Post by carlos on Aug 11, 2008 21:50:11 GMT 1
I've got a dog rough micron - No holes but has been welded where it's been dropped and split round the bracket!
Where are you, I'm sure we can do a deal
If the heat can't be dissapated from the exhaust, then it may affect the way the bike runs, as the gases are very expanded when they are hot, and become denser when they cool, i.e. take up less space!
The effect of the expansion chamber gives the gases more space, therefore making the pressure in the exhaust drop, and so sucking gases away from the engine, however, hotter gases take up more space, i.e. create greater pressure, so it MAY affect the performance of the bike!
Sorry to turn it into a chemistry lesson!
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Post by mellow on Aug 12, 2008 15:32:21 GMT 1
can ya run through that again please m8   ;D |
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kwack10
Thrash Merchant
Does my bum look big in this
Posts: 320
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Post by kwack10 on Aug 12, 2008 19:36:54 GMT 1
I've got a dog rough micron - No holes but has been welded where it's been dropped and split round the bracket! Where are you, I'm sure we can do a deal If the heat can't be dissapated from the exhaust, then it may affect the way the bike runs, as the gases are very expanded when they are hot, and become denser when they cool, i.e. take up less s The effect of the expansion chamber gives the gases more space, therefore making the pressure in the exhaust drop, and so sucking gases away from the engine, however, hotter gases take up more space, i.e. create greater pressure, so it MAY affect the performance of the bike! Sorry to turn it into a chemistry lesson! Jeeez are you a teacher ;D ;D you sure know your stuff mate ;D |
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Post by twostroker on Aug 12, 2008 19:44:29 GMT 1
sorry for any spelling mistakes the screen is realy blury on my pc so i cant see much lol.
im in colchester essex.
the radiator is in perfect condition,plug chop is perfect.
im baffeled???
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Post by carlos on Aug 13, 2008 8:32:03 GMT 1
If you want to pop down to Kent sometime, you can have the micron for 20 quid! But it is rough! No holes though!
Or you can pay the P+P on it!
But, the bike is going to run differently with a different exhaust on!
What about a cooling fan?? It wouldn't be too hard to make something!
My last 125lc used to run at about 3/4 but never went into the red, I thrashed it for a year and about 8000 miles, used to red line it from cold and it was fine! Don't know how it's next owner got on, but I was 17, and stupid at the time!
PM me if you want to sort something out with the exhaust, if you do come down you can see my project! I'm near West Malling if you want to chuck it into RAC and see how far it is!
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Post by carlos on Aug 14, 2008 0:37:44 GMT 1
I've been thinking some more! The exhaust runs quite close to the belly pan, and if it giving off that much heat it would melt it!
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Post by twostroker on Aug 14, 2008 18:53:11 GMT 1
I've been thinking some more! The exhaust runs quite close to the belly pan, and if it giving off that much heat it would melt it! tell me about it  ,theres some pics of my bike on here somewhere, look for "my 125lc pictures" if interested all freshly all painted up in standard red/white colours by myself,i did need a head light fairing,now i need another belly pan too as mine is black and crispy around the exhaust (i even enlarged the hole for the pipe to come through before i spayed it im looking into getting a pipe made up the the same company that did the pipes on nutty tarts rg500 gamma,he said he can make it to an exact spec to suite my tuned bigbore set up on the rg500 they look excelent too in the laqured bare metal finish |
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Post by carlos on Aug 14, 2008 23:11:13 GMT 1
Has it got plenty of power?
There's no way it could be firing a little late?
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Post by twostroker on Aug 15, 2008 6:53:59 GMT 1
Has it got plenty of power? There's no way it could be firing a little late? i thought my timing may be a ted retarded but its been checked and its fine,just as well cos i didnt fancy slotting my stator it goes realy well if i thrash it from a standing start,far quicker than a standard 125lc,but if im cruising as 60mph then open it ip it will max out about 80mph and struggle to get there,a friend of mine has custom made a pipe for his big bored 125lc and a few if the pipe dimentions change a fair bit when you take into account exhaust potrt duration and its extra cc.compared to a standard barrel. alot of people slag off big bores and they are a bit of grief but its defenetly much better acceleration now than standard. future mods are,520 pitch chain kit,bigger clutch conversion,better pipe and finaly full fuel/air set up on local dyno |
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Post by carlos on Aug 15, 2008 12:09:36 GMT 1
Tuning anything can cause grief, especially with a single cylinder 2 stroke as there are quite a few variables, and symptoms can suggest one thing, when it's usually something else!
I'm off to see if I can get mine to start before the 23rd kick!
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Post by carlos on Aug 15, 2008 18:17:52 GMT 1
Mission accomplished, raised the needle height, tweeked the pilot air screw and she starts a lot easier!
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Post by mellow on Aug 18, 2008 16:35:52 GMT 1
im looking into getting a pipe made up the the same company that did the pipes on nutty tarts rg500 gamma,he said he can make it to an exact spec to suite my tuned bigbore set up on the rg500 they look excelent too in the laqured bare metal finish think ul find they are now black  |
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Post by twostroker on Aug 18, 2008 20:39:33 GMT 1
im looking into getting a pipe made up the the same company that did the pipes on nutty tarts rg500 gamma,he said he can make it to an exact spec to suite my tuned bigbore set up on the rg500 they look excelent too in the laqured bare metal finish think ul find they are now black why did they rust when they were bare with a laquer finish??? bare looks so much better than black inmo |
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,theres some pics of my bike on here somewhere, look for "my 125lc pictures" if interested all freshly all painted up in standard red/white colours by myself,i did need a head light fairing,now i need another belly pan too as mine is black and crispy around the exhaust (i even enlarged the hole for the pipe to come through before i spayed it 