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Post by Brian on Nov 30, 2007 2:29:30 GMT
Hello All,,
I got to your Forum through Wayne.. I was looking around nice site, I live in BC Canada,, I thought I'd ask the folks in the know about some ideas...
I've been looking at installing a lighter flywheel on my '05 PX150, and there is just limited options I've found from my resources,, seems like the HP4 is the only one yet to get it here it's expensive. Secondly I would like to get a piston kit and from what I've read the Polini 177Al is the one, comments or recommendations on porting or something else to get a bit more jam out of this engine.. Thanks for the bandwidth...
Oh one other thing,, which would you guys consider the best magazine Vespa related for quality / information ?? Thanks
Cheers Brian
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Post by Stu on Nov 30, 2007 11:56:14 GMT
Hi Brian---welcome to the site---I'm sure Wayne and a few others will come back to you. Whilst I'm not so much a Vespa guy (more Lambretta), before I did anything, I would weigh up the pro's and con's of which kit to use. Certainly, an upgrade kit is a good idea, 150's are O.K. if you are simply chugging about and want ultra reliability, which Vespa always build in, but if you want something a bit more pokey, then the kit you mention may be OK, but from our experience, if you still want reliability with a marked increase in BHP, then we use a DR180 kit with uprated jets and a good Expansion exhaust system. These are good reliable and strong kits that come with all parts, including matching head and required gaskets---they are available in this country and could be posted direct to you to simply 'bolt-on'! Remember, as a general rule of thumb, if you increase performance, you decrease reliability---think of it as a set of scales----one side goes up, the other comes down! A lot depends on what sort of terrain you are riding in, what distances you are travelling and finally, good old common sense---i.e. --run it in carefully and don't screw the knackers off it for long periods. The others are good kits, but I understand that they need to be set up carefully or they can cause problems. Regarding the lightened flywheel ---these do give you more RPM, but can often cause problems in getting and keeping a decent 'Tick-over'. Perhaps someone else in the club with more Vespa experience might want to say if they agree or disagree.----What do you think Daz and Rowey? All the best mate, Stu.
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tayters
Trogs Top Chatter! In Practice!
The mechanical Kiss Of Death!!!
Posts: 98
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Post by tayters on Nov 30, 2007 18:11:56 GMT
Alrite Brian, I used to run a Malossi 166 on a PX125, this comes with the profiled head and all gaskets. It will bolt straight on with no porting but to get the best out of it you need to port the bottom end and inlet. The Polini kits are good, more bottom end power, whereas the Malossi needs to be revved into the power band to go. The downside with the Polini is that the carburation and timing need to be spot on (timing needs to be retarded) or it will go pop pretty quick, but when it is set up properly they are good kits( I also run a Polini 208 and have had that for 8 years or so, went from Cornwall to Scotland and back no probs)
The set up I had was as follows: 166 with full bottom end tune,Gas flowed Crank, 28mm Dellorto,x2 needle, 125 main jet, 264 atomiser, Simonini pipe, uprated primery drive. This would cruise all day at 70mph. Hope this is of use!
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tayters
Trogs Top Chatter! In Practice!
The mechanical Kiss Of Death!!!
Posts: 98
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Post by tayters on Nov 30, 2007 18:14:57 GMT
Oh yeah, lightened flywheels on Vespas are shite for road use, steer clear mate.
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tayters
Trogs Top Chatter! In Practice!
The mechanical Kiss Of Death!!!
Posts: 98
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Post by tayters on Nov 30, 2007 18:18:42 GMT
Oh yeah again, don't listen to Stu, he's 112 years old, dribbles alot and smells of wee!!
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Post by Stu on Nov 30, 2007 22:53:05 GMT
Take no notice Brian---I'm only 109! I didn't mean to smell of wee, I just borrowed some of tayters aftershave!
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Post by wayne on Dec 1, 2007 13:40:15 GMT
hi Brian, im glad you found the site.... i would recommend the dr180 kit.......i have just had one fitted by stu and darren ( stu is the one that apparently smells of wee) on to my px 125..also with a sterling expansion chamber, its run in now and going well...a few teething problems while we sorted out what jet was best and of course the ball ache of running it in but now thats sorted its flying....
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Post by Brian on Dec 1, 2007 17:23:19 GMT
Thanks to all,, I have been looking aorund and have found a few good sources for the DR180 around here,, but after more research I wondering about... Porting ?? Needed ?? Maybe not but would it not add that much better flow with a smooth casting ?? And if so - the barrel only or the block also ?? After all is said an done can my SI 20/20 OE Carb man up to the task of the amount of fuel delivery is required ?? Then the last two things - Clutch Springs ?? would it be needed with the extra power.. taller gears ?? this would be a luxury I think but for the cost maybe worth it ?? What could I expect out of my 3 port in KPH with just the Piston kit and porting ?? Thanks for the input....and the money I will now be spending Cheers Brian
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Post by Brian on Dec 1, 2007 17:26:46 GMT
Oh and lastly I forgot - will I be able to continue to use my auto luber with a piston upgrade ?? Thanks again !!!
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Post by wayne on Dec 1, 2007 17:27:48 GMT
its getting far to techinal for me now mate......i will leave the others to help you out..
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Post by Brian on Dec 1, 2007 17:37:27 GMT
Hey Wayne,, What about your PX - you simply added the DR180 kit ? Do you still have the auto lube ? and that's all you did ? What kind of acceleration and top speed to you have now versus stock ?? Thanks again.. its getting far to techinal for me now mate......i will leave the others to help you out..
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Post by stuntman on Dec 1, 2007 19:57:21 GMT
for what its worth,heres my tuppence worth.if you look at the bottom of the barrel on your standard set up and also look at the bottom gasket,you should i think see a differance in the size of ports,on my 166 kit ,it showed that the gasket was aprox a third bigger, so you will have the same size on your 125 block, but bigger ports on your tuned barrel,thus leading to less flow of gasses ect ,thats why its better to have your barrel matched to your engine, i hope this wasnt to muddled, but i think its right ,if not iam sure someone else will let you know more
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Post by wayne on Dec 1, 2007 20:21:50 GMT
I didnt put it on myself brian so im not 100% sure, but i think it was just a case of bolting the kit on and changing the jet, remebering ive got an expansion chamber on, the top speed hasnt seemed to change much, about 62 or 63 or 100kmh for you but what i do notice is the acceleration is a lot lot quicker and it keeps it with a passanger on the back....i still have the autolube no problems.........well worth it i think.... stu or lambrettatech on here are the experts they put my kit on so should be able to give you more detailed help.....i am better at riding them than getting my hands dirty !!!!
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Post by Stu on Dec 1, 2007 23:13:08 GMT
Hi Brian---Its Wee Stu here again! As I say, I'm more Lammy than Vespa, but I agree with Stuntman . It follows that matching up the barrel and block is best, BUT, only if you feel confident with what you are doing. The DR kits are designed to be able to cope with all kinds of treatment,---they are fast, but may not be the fastest, nor produce the greatest BHP, but they are reliable and are designed to 'bolt on and ride'. Of course, a bigger carb etc could be fitted, but at a cost in Dollars, coupled with a larger fuel bill. Your existing carb will do the job---but it's all down to how far you want to go and personal choice. My choice would be the DR kit and Expansion chamber coupled with an up rated primary drive (but you'd have to split the engine to do that), for that bit extra MPH----but as I say, you get what you pay for, or can afford. Your existing clutch springs should be O.K., depending on how many miles you've done already. As Wayne says, you will find the Kit, without up-rated primary drive, will hold 60-65 mph loaded up, all day, with good acceleration. Just to repeat myself (as I'm told we 'Old' people do), the Malossi Kit is probably the fastest, but I think as Tayters said, get it set up right to stop it going 'Pop'. The Sterling Stainless Steel Expansion Chambers for Vespa and Lambretta, in my opinion , look, sound and perform well---and at a much lower cost than many of its competitors in the same field. Hope this is of some use Brian---sorry to be so long winded in my reply, but there are so many variables in this area and after all, if to you it looks good, sounds good and does what you want, who cares if its not the fastest thing on two wheels!!!!!
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Post by Brian on Dec 2, 2007 0:11:03 GMT
Thanks for all the input guys,, greatly appreciated,,
I think my final outcome will be a DR180 kit and possibly if I can find someone to match the chambers up well I will most likely get it done, and then it is just a matter of finding the right jet,, currently I am running a 103 in my 20/20 and a Sito Plus.. I think the Sito should be alright for the kit to breath,, if not I will look at the possibility of an EC also...
I'm not looking to make it race worthy just a bit quicker I get 90-95kmh like 55mph as it is stock with the Sito and jet..
Seems like it's all trial an error really and worse case I can fiddle more if I'm still not happy,, there's also a few sources around here with LML 5port bolt in but not cheap...
Thanks again !!
Cheers Brian
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