cagive seems slower top end after fitting polini kit

prycy26 · 02-09-09, 09:59 PM

hi everyone need some help before i had the polini 160 kit the power band was really powerfull but now it doesnt even feel like there is one there can anyone help please also can you fit a 34mm carb on the cagivas mines a 2001model

jackdim · 02-09-09, 11:31 PM

have you had your head remachined?

collywog19 · 03-09-09, 08:09 AM

This is why the big bore kit is a waste of cash.

Col

Benneyboy · 03-02-10, 06:08 PM

Originally Posted by collywog19

This is why the big bore kit is a waste of cash.

Col

eh ?

don't mean to sound like a twat bud but could you explain more , i mean in al fairness it may not be jetted right at the moment causing it to bog in power and jack surely a bore kit is brought and fitted why would the head need to be machined buddy , again not meaning to sound like a cocky fucker lol

stirlinggaz · 03-02-10, 07:54 PM

hi,
your not running it with the 28mm carb are you? fit the mikuni 35mm or dellorto 34mm (i have both + havt decided whats best)
without the bigger carb you wont see massive gains, though you will see a bit more power mid-range.(+ a little bit at the top end but not a massive increase)
you will need to re-jet however + i suspect thats what your problem is.
whats in it at present?
i would even consider going up to 37/38mm withthe bbk.should free up that couple of extra bhp with the right exhaust,
cheers,
GAZ

70RSMAT · 04-02-10, 05:47 PM

Originally Posted by stirlinggaz

hi,
your not running it with the 28mm carb are you? fit the mikuni 35mm or dellorto 34mm (i have both + havt decided whats best)
without the bigger carb you wont see massive gains, though you will see a bit more power mid-range.(+ a little bit at the top end but not a massive increase)
you will need to re-jet however + i suspect thats what your problem is.
whats in it at present?
i would even consider going up to 37/38mm withthe bbk.should free up that couple of extra bhp with the right exhaust,
cheers,
GAZ

I had the polini kit and it was shite tbf, and you can run it fine on the 28mm although i had a 34mm. Slower than the rotax barrel unless ported imo

stirlinggaz · 04-02-10, 08:59 PM

hi,
heard a few people say this...

either most people arnt setting it up correctly, ie with a decent race ehaust &/or bigger carb correctly jetted.....
or it is sh*te, but this may be down to the design of it.
im sure in the hands of a cabable tuner, it would free up a few more horses,(surely a couple more than standard cylinder?)
i might consider this as my next experiment, if i can get my hands on a cheap bbk, even one that needs replated...
when it comes time to do the top end one one of my mitos, i will seriously comnsider it,
cheers,
GAZ

stirlinggaz · 04-02-10, 09:00 PM

Originally Posted by 70RSMAT

I had the polini kit and it was shite tbf, and you can run it fine on the 28mm although i had a 34mm. Slower than the rotax barrel unless ported imo

which mito has the rotax barrell then?

Shelton#61 · 04-02-10, 09:05 PM

true, 11bhp more at 9k rpm, the best aprilia bbk is a standard Rotax cylinder, bored out to 60mm and re-nikasil'd, however the polini kit is still brilliant, but port timings can vary from cylinder to cylinder, together with what base gasket you couple it with

stirlinggaz · 04-02-10, 09:39 PM

hi,
yes the polini kit for rotax engined rs125's i have exerience with, + despite what people say they are not unreliable (in the right hands) +even in the hands of an amatuer can give gains of around 6bhp, combined with the right pipe & carb, were talking about a true 34bhp.
But seeing this was posted in the Mito sub-section,we can forget about the rs125 bbk for a second.
the mito kit is a different kettle of fish,
it seems that the extra bhp can be quite hard to benefit from or even release.
i have seen dyno's where the bhp did drop, on a like for like basis.
as i said earlier, perhaps its the design?
or maybe people havnt got the right combination of exhaust,carb & jetting?
i have no prior ecxperience of using the polini kit with the mito, so im just guessing here.
the mito & rs bbk's are completely different + as such, need a different approach, dont you think?
i think the op should try either the tmx35 or vhsb34es, as a starting point.
i dont think he mentioned what exhaust he was using, did he?
i am seriously thinking of keeping one of my mitos stock, with 28mm carb + oem exhaust, full power from factory + comparing it with my other mito, with either the standard cylinder tuned by one of the respectable tuners,or preferably with the bbk (again tuned) with the tmx35 & race exhaust.
sounds like a plan......should manage that before the summer,
cheers,
GAZ

70RSMAT · 05-02-10, 04:21 PM

Originally Posted by stirlinggaz

which mito has the rotax barrell then?

I was talking about my rs, i assume the polini kit is virtually identical for both. If they do vary a lot i must have got a really shit one coz the jetting was perfect.

collywog19 · 11-02-10, 12:34 PM

Polini kits suck ass.

Col

l.t.racing · 15-02-10, 05:43 PM

will be a 2 ring piston in it as 1 of the rings gone and you running on bottom ring

briggsy84 · 16-07-10, 10:49 PM

personally id just take it off mate.. i bought my cagiva how it is an tbh dont really no a great deal about the mito but love riding it.. it cost me 1300 quid an come with 12 months tax 12 months m.o.t an a had a service a week before came with loads of papers its a 2000 model 6 speed. with an arrow exhaust foam air filter an when i got it i found it was quite boggy on the pull away but the fella i bouth it off gave me another jet he had to take out to pass the m.o.t so i stuck that in an i must say the difference is imense.. i dunno what size the jet is but when i replaced it an looked the one in the carb had 700 etched on the bottom an the new one i put in had 705 etched onto the bottom the powerband seems more lively although i must say i didnt notice a mighty increase in petrol consumption lol but worth the extra few quid.. people slag these bikes off and the rs but to be fair there both lovely bikes ofcourse im byast a but an would pick a mito over an rs lol. mines got bridgestone battle axe tires an when i looked at my mates pirellis on his nsr i noticed his where 17/70/130 an mine are 17/60/150 so ive got better patch contact plus the makes the wheel look wider but ive yet to get close enough to an rs to check the tire profile anyway soz to waffle on hope ya sort ya problem out pal i can imagine its frustrating ya do somethin to make ya bike faster an it ends up slower

02-09-09, 09:59 PM	#1
prycy26 Newbie Join Date: Sep 2009 Posts: 1	cagive seems slower top end after fitting polini kit hi everyone need some help before i had the polini 160 kit the power band was really powerfull but now it doesnt even feel like there is one there can anyone help please also can you fit a 34mm carb on the cagivas mines a 2001model

02-09-09, 11:31 PM	#2
jackdim Old Hand Join Date: Jul 2008 Location: Bristol Posts: 2,649	have you had your head remachined? __________________ Originally Posted by Stanley just because it feels ok doesnt mean it is. Bit like catching a glimpse or your fit cousins twat when she falls over pissed.

03-09-09, 08:09 AM	#3
collywog19 Old Hand Join Date: Feb 2008 Location: County Durham Posts: 785	This is why the big bore kit is a waste of cash. Col __________________ http://i16.photobucket.com/albums/b4...tmontrack2.jpg

03-02-10, 06:08 PM	#4
Benneyboy Junior Mechanic Join Date: Jan 2009 Posts: 251	Originally Posted by collywog19 This is why the big bore kit is a waste of cash. Col eh ? don't mean to sound like a twat bud but could you explain more , i mean in al fairness it may not be jetted right at the moment causing it to bog in power and jack surely a bore kit is brought and fitted why would the head need to be machined buddy , again not meaning to sound like a cocky fucker lol __________________ Nos burner : i dont think you could of bought a worse rs if im honest i mean theres a bad rs then theres yours which is like the AIDS RS its fucking awful, take the warning kids rs 125s are like banging a smacked out whore fun at first, then you just wish you could turn back time and wash the aids away

03-02-10, 07:54 PM	#5
stirlinggaz Old Hand Join Date: Dec 2007 Location: stirling Posts: 770	hi, your not running it with the 28mm carb are you? fit the mikuni 35mm or dellorto 34mm (i have both + havt decided whats best) without the bigger carb you wont see massive gains, though you will see a bit more power mid-range.(+ a little bit at the top end but not a massive increase) you will need to re-jet however + i suspect thats what your problem is. whats in it at present? i would even consider going up to 37/38mm withthe bbk.should free up that couple of extra bhp with the right exhaust, cheers, GAZ __________________ current bikes 1986 RG125 GAMMA mk1 (with micron exhaust, producing 23bhp old skool style) 1986 MTX 125 (with 200cc atac fitted) 1992 Cagiva Mito, lucky explorer with dellorto vhsb34es carb. 1992 Cagiva Mito, arrow exhaust & TM35 carb producing ACTUAL 33bhp & i hate to say it, but beats the rs every time! Last edited by stirlinggaz; 03-02-10 at 07:56 PM.

04-02-10, 05:47 PM	#6
70RSMAT Garage Owner Join Date: Dec 2008 Location: Grimsbay Posts: 1,795	Originally Posted by stirlinggaz hi, your not running it with the 28mm carb are you? fit the mikuni 35mm or dellorto 34mm (i have both + havt decided whats best) without the bigger carb you wont see massive gains, though you will see a bit more power mid-range.(+ a little bit at the top end but not a massive increase) you will need to re-jet however + i suspect thats what your problem is. whats in it at present? i would even consider going up to 37/38mm withthe bbk.should free up that couple of extra bhp with the right exhaust, cheers, GAZ I had the polini kit and it was shite tbf, and you can run it fine on the 28mm although i had a 34mm. Slower than the rotax barrel unless ported imo __________________

04-02-10, 08:59 PM	#7
stirlinggaz Old Hand Join Date: Dec 2007 Location: stirling Posts: 770	hi, heard a few people say this... either most people arnt setting it up correctly, ie with a decent race ehaust &/or bigger carb correctly jetted..... or it is sh*te, but this may be down to the design of it. im sure in the hands of a cabable tuner, it would free up a few more horses,(surely a couple more than standard cylinder?) i might consider this as my next experiment, if i can get my hands on a cheap bbk, even one that needs replated... when it comes time to do the top end one one of my mitos, i will seriously comnsider it, cheers, GAZ __________________ current bikes 1986 RG125 GAMMA mk1 (with micron exhaust, producing 23bhp old skool style) 1986 MTX 125 (with 200cc atac fitted) 1992 Cagiva Mito, lucky explorer with dellorto vhsb34es carb. 1992 Cagiva Mito, arrow exhaust & TM35 carb producing ACTUAL 33bhp & i hate to say it, but beats the rs every time!

04-02-10, 09:00 PM	#8
stirlinggaz Old Hand Join Date: Dec 2007 Location: stirling Posts: 770	Originally Posted by 70RSMAT I had the polini kit and it was shite tbf, and you can run it fine on the 28mm although i had a 34mm. Slower than the rotax barrel unless ported imo which mito has the rotax barrell then? __________________ current bikes 1986 RG125 GAMMA mk1 (with micron exhaust, producing 23bhp old skool style) 1986 MTX 125 (with 200cc atac fitted) 1992 Cagiva Mito, lucky explorer with dellorto vhsb34es carb. 1992 Cagiva Mito, arrow exhaust & TM35 carb producing ACTUAL 33bhp & i hate to say it, but beats the rs every time!

04-02-10, 09:05 PM	#9
Shelton#61 Supporter Join Date: Apr 2008 Location: Hull, England Posts: 2,847	true, 11bhp more at 9k rpm, the best aprilia bbk is a standard Rotax cylinder, bored out to 60mm and re-nikasil'd, however the polini kit is still brilliant, but port timings can vary from cylinder to cylinder, together with what base gasket you couple it with __________________ adam-shelton.com

04-02-10, 09:39 PM	#10
stirlinggaz Old Hand Join Date: Dec 2007 Location: stirling Posts: 770	hi, yes the polini kit for rotax engined rs125's i have exerience with, + despite what people say they are not unreliable (in the right hands) +even in the hands of an amatuer can give gains of around 6bhp, combined with the right pipe & carb, were talking about a true 34bhp. But seeing this was posted in the Mito sub-section,we can forget about the rs125 bbk for a second. the mito kit is a different kettle of fish, it seems that the extra bhp can be quite hard to benefit from or even release. i have seen dyno's where the bhp did drop, on a like for like basis. as i said earlier, perhaps its the design? or maybe people havnt got the right combination of exhaust,carb & jetting? i have no prior ecxperience of using the polini kit with the mito, so im just guessing here. the mito & rs bbk's are completely different + as such, need a different approach, dont you think? i think the op should try either the tmx35 or vhsb34es, as a starting point. i dont think he mentioned what exhaust he was using, did he? i am seriously thinking of keeping one of my mitos stock, with 28mm carb + oem exhaust, full power from factory + comparing it with my other mito, with either the standard cylinder tuned by one of the respectable tuners,or preferably with the bbk (again tuned) with the tmx35 & race exhaust. sounds like a plan......should manage that before the summer, cheers, GAZ __________________ current bikes 1986 RG125 GAMMA mk1 (with micron exhaust, producing 23bhp old skool style) 1986 MTX 125 (with 200cc atac fitted) 1992 Cagiva Mito, lucky explorer with dellorto vhsb34es carb. 1992 Cagiva Mito, arrow exhaust & TM35 carb producing ACTUAL 33bhp & i hate to say it, but beats the rs every time!

05-02-10, 04:21 PM	#11
70RSMAT Garage Owner Join Date: Dec 2008 Location: Grimsbay Posts: 1,795	Originally Posted by stirlinggaz which mito has the rotax barrell then? I was talking about my rs, i assume the polini kit is virtually identical for both. If they do vary a lot i must have got a really shit one coz the jetting was perfect. __________________

11-02-10, 12:34 PM	#12
collywog19 Old Hand Join Date: Feb 2008 Location: County Durham Posts: 785	Polini kits suck ass. Col __________________ http://i16.photobucket.com/albums/b4...tmontrack2.jpg

15-02-10, 05:43 PM	#13
l.t.racing Senior Mechanic Join Date: Dec 2009 Location: doncaster Posts: 1,180	will be a 2 ring piston in it as 1 of the rings gone and you running on bottom ring

16-07-10, 10:49 PM	#14
briggsy84 Newbie Join Date: Jul 2010 Location: birmingha, Posts: 1	personally id just take it off mate.. i bought my cagiva how it is an tbh dont really no a great deal about the mito but love riding it.. it cost me 1300 quid an come with 12 months tax 12 months m.o.t an a had a service a week before came with loads of papers its a 2000 model 6 speed. with an arrow exhaust foam air filter an when i got it i found it was quite boggy on the pull away but the fella i bouth it off gave me another jet he had to take out to pass the m.o.t so i stuck that in an i must say the difference is imense.. i dunno what size the jet is but when i replaced it an looked the one in the carb had 700 etched on the bottom an the new one i put in had 705 etched onto the bottom the powerband seems more lively although i must say i didnt notice a mighty increase in petrol consumption lol but worth the extra few quid.. people slag these bikes off and the rs but to be fair there both lovely bikes ofcourse im byast a but an would pick a mito over an rs lol. mines got bridgestone battle axe tires an when i looked at my mates pirellis on his nsr i noticed his where 17/70/130 an mine are 17/60/150 so ive got better patch contact plus the makes the wheel look wider but ive yet to get close enough to an rs to check the tire profile anyway soz to waffle on hope ya sort ya problem out pal i can imagine its frustrating ya do somethin to make ya bike faster an it ends up slower

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