LCGB Forums

im in the market for a new 225 top end i dont want to go reedvalve as this means lopping the battery tray off my sx200. so, these two are at the top of my list , the mugello and the rt . i will be using a gori race 50mm to go with the top end . which would you go for and why, or are there any other top end to consider . cheers simon

Yes there are others, the gt 200 being one. Also if you have the manifold for the 30mm carb,it exits on the left so no hacking battery trays. Couldn't give you a best comparison on the other two though, sorry, Speedy.

I think you are looking at 2 very different types of kit.
The RT can be set from touring to race ( go to the MB site and read up on it)
The mugello's I have ridden with need to rev.
So decide on way you want from the kit, how much you are prepared to spend then go speak to a dealer that does both kits ang get him to help you spec it up.

I wouldn't rule out a TS1 out just because of the battery tray as LTH now do a left hand side manifold which means you can leave the tray in place. Also don't rule out a reed valve on a muggy/radpido/ RT etc as you can retro fit an LTH/Atomic Or MRB reed which exits on the left. I have a Rapido 225 with Atomic reed exiting on the left and really rate it. As said above, work out what you want from a kit and then weigh up your options

As I'm strangling the performance with a clubman type exhaust I think reedvalve kits would be waisted. I don't see the point of converting a none reed to reed when you can buy a ts1, monza, casa, rb ect. If ideas using an expansion pipe then yes reedvalve it would be. Trying to keep standard ish looking but with a bit more poke.

I've had an RT for a couple of years now, although with an expansion and 30mm PHBH.
The performance is very good and pulls me around two up quick happily!

My Dad has one with a BGM clubman and that is a pleasure to ride, no expansion kick but is a real nice almost standard feel to the riding style. However, has more than enough power and rev on to make it a real decent rally and round town ride.

I'd say the "revvy" Gori race pipe might strangle the bottom end performance more than the MB clubman will strangle the top end as neither kit is highly tuned in out of the box state.

I fitted an LTH small reed to my Mugello 225 which totally transformed it with an ADS3 [torquey] exhaust. I blew it up in standard form so it gave me the excuse to try the reed valve mated to a TS1 piston, as I had a spare TS1 piston but no spare Mugello piston. I too didn't want to remove the battery tray.

Given the choice of RT or Mugello I'd opt for the RT, as similarly priced but the RT has a CNC head [supposedly to give better cooling?] plus alloy base gaskets and new stud kit.

The Avanti would be a good option, ticks all the boxes you have chosen and is now a well proven kit with plenty of feedback.

Ive ran both kits in past, but found the GT 200 kit with ron moss clubman performed better, changed to pipe for kick i really wanted from engine and is my prefered lammy with battery tray in tact for last 2 yrs

thanks for the info everybody, so now im leaning towards the gt kit and the 240 version . who stocks the gt kits ?. cheers simon

i suppose the iron barrelled kits are a bit old skool but if you have a nip up you can pull over and pretend you are having a smoke , let it cool down and start it up and on your way again, even if you damage your piston , a rub with some dick emmery around your piston and bore and away you go , if on a nicasil its game over for piston and cylinder .... but you might not of had a nip up in the first place with thebenificial cooling of ally - nic lol

a-teamlambretta wrote:thanks for the info everybody, so now im leaning towards the gt kit and the 240 version . who stocks the gt kits ?. cheers simon

Don't forget that you need the GT 62mm crank to go with this to make 240cc, plus piston is 18mm gudgeon pin so even if you use an alternative crank you'll need a rod with 18mm small end eye. Plus you may need to "trench" your casing to get clearance on 62mm big end. GT casing already has deep trench to work with this crank.

I'm running GT200 kit in standard form with a 58/107 crank, 30mm carb on left and BGM clubman, will cruise at 60/65 with ease and still plenty left for overtaking. Corrado stocks these as does Disco Dez. For the 240 version you probably need to contact Rich T or Eden Bakewell

Or you could set up kit on a 62 x 116 af crank which fits in casing with no trenching required.
Ive thought about going 240 with mine but find it does enough as 200 kit with 60 x 110 crank with expansion.

The original question within this Post might have had some rather ‘tangential’ responses but, nonetheless, very good advice, IMHO.

Notably, the choice of crank with various, longer, strokes is fundamental to any kit & for very good reason.

Personally, I would advocate that if a new crankshaft were required, a long as possible stroke be on the shopping list.

There is not just the opportunity to raise cubic capacity but the options become greater to ‘dial in’ enhanced engine characteristics. In the case of the Rapido, there are benefits to ‘stroking’ in that it ‘tames’ the beast!

Whether the choice remains limited to RT225 or Mugello 225, otherwise Avanti, GT or Rapido as suggested, there is, by selection, a golden opportunity to select a very civilised high torque kit that can be reliable & clean (with a good filter fitted)

MickYork wrote:The Avanti would be a good option, ticks all the boxes you have chosen and is now a well proven kit with plenty of feedback.

Have just fitted an Avanti with a TSR Evo pipe, modified by Darryl Taylor. Still running it in, but its great.