exhaust imola 186 kit

[dazzer]

hi guys could do with a little info as new to lambrettas as always rode vespas so dont shout at me ,i have a lambretta 125dl/gp with a imola 186 kit in,the guy i bought it off told me there as been a small fortune spent on having all the engine done ,noticed a bad crack in the exhaust which i was thinking of getting welded but seen these scooter rs exhausts for the imola kit which to me seem cheap for 110 quid,now can any 1 give me some feed back wether this exhaust would be all right as im worried it may end up siezing my engine,any info would be helpfull,thanks

[corrado]

With the correct jetting it won't seize your engine but gear ratios are critical to how well it performs or not as the case may be. Imola kit is designed to rev high given that the carb is big enough to supply enough fuel. Some exhausts allow the engine to rev higher, scootrs being one of them but revvy exhausts also like low gearing ito be able to perform.
You'd need to say what carb and more importantly what gearing you currently run to get the right info.
My Imola performed really well with a Scootrs exhaust combined with a Mikuni TMX27 carb and 5.4 final drive gearing.

[psychedelicropcircle]

I use a curly pipe on standard LI150 which works. I bought it off that man there^^^^^

[10 inch Terror]

I run mine on 15 / 47 sprockets a 30mm Delly and a JL 4 race pipe and it goes like s&@t off a stick.

[dazzer]

cheers corrado i will find out the gearing ratio off the lad i bought it off,i know it as a 30mil deloretto carb and it drinks fuel like georgy best drank ale

[chez]

i ran a scootrs pipe for a couple of years it was perfectly ok, nothing over special, and certainly not crap just reasonablely good, it suffered from stress and required welding but was fair value for money. then i tried a ads5 in chrome plated steel which was extremely industrially well made but probably more suited to a ts1 than the imola in its power delivery so then i tried the ads3 which has made the imola perform brilliantly plenty of power and in the right range. hope this is of some help as at 350 quid for a pipe inc chrome it can be an expensive way of finding out which pipe suits.(my gearing is 16/46 li150)

[dazzer]

i spoke with the lad i bought the scoot off and he says that he thinks its got gp 150 gearing,so was going to try the scootrs exhaust but also change my 30 mil carb to a 28mil and get it set up right to it,does that sound okay,new to all these kits you get nowadays just need some sound advice as i dont want to knacker the scoot up and cost more money,cheers in advance

[chez]

stick with 30mm and set that up save the cost of a carb ball park jetting of mine 40 slide x7 needle 130 main 55 pilot 200 float jet this should see you somewhere near

[corrado]

GP150 gearing has a big gap between 3rd and 4th gear. It also has 4.8 final drive which is bad for Imola kit and revvy exhausts. You need to drop the front sprocket to a 16 and fit an 81 link chain, that'll make the final drive gearing 5.4, pretty much what mine was when it was a flyer. Unless you've already got both carbs I wouldn't bother changing it, you're unlikely to see much of a difference between 28 and 30. Mine was good for around 80 mph even with the short gearing because it revved over 9,000 rpm.

[dazzer]

thanks for the replys guys lots of good info there