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View Full Version : 1000cc big bore kit



logic_28
10-28-2008, 05:08 AM
http://i306.photobucket.com/albums/nn262/scoot-mania/kitgp9.png

http://i306.photobucket.com/albums/nn262/scoot-mania/kitgp2.png

http://i306.photobucket.com/albums/nn262/scoot-mania/kitgp6.png

http://i306.photobucket.com/albums/nn262/scoot-mania/kitgp5.png

http://i306.photobucket.com/albums/nn262/scoot-mania/kitgp3.png

This big bore kit is for the Gilera GP800 but the engine on the mana/gp800 are the same 839cc vtwin.

zuman
10-28-2008, 07:27 AM
So are you gonna do it?
Would the electronic mapping need to be reprogrammed?

logic_28
10-28-2008, 07:44 AM
for me the mana is plenty fast enough, so I won't be purchasing this big bore kit for my mana, it looks like an expensive piece of kit!

djleoteo
12-15-2011, 03:16 PM
HI, plz repost the links as I'd like to know about the bore kit, thank u :)

pete roper
12-15-2011, 03:59 PM
What possible performance inrease do you think you are going to ger from an extra 100-150cc's on a machine with a single, small, throttle body? You might get a whisker more torque thats about it. You would also need some sort of map modifier to get it to fuel up properly and the belt life would be shortened. Why bother? If you want more performance why not just buy a different motorbike?

Not sayin' you shouldnt do it. Simply that I can't see the point personally.

Pete

Rockynv
12-16-2011, 07:52 AM
Probably get more bang for the buck from a little head porting/polishing along with an exhaust that is a bit more free flowing. If the cylinder was worn and you are looking at replacement anyway then go for it but there is more as Pete mentioned that would have to be done to compensate for the increased displacement.

TheSwede
01-03-2012, 09:09 PM
It's a fun idea but I'd make an educated guess that it wouldn't be very good value for money.

The genius about the mana is the transmission which allows the engine to stay at peak power during the entire acceleration.

Big bore mods on the other hand tend to add bottom end grunt which is brilliant for normal bikes with gears, but on the mana all you really need is more top end power to go faster.

To improve the mana's engine performance I'd:

1. Have a really good pro do the inlet and outlet ports (I stress that he really must know what he's doing, too many rednecks out there with a drill who claim to be experts)

2. Look if you can find or have a more agressive cam made

3. Replace the exhaust of course

4. I had a look at the inlet on my own bike but it actually looks very well designed, don't think you'll gain much from an aftermarket filter

5. Get it set up on a dyno with one of these: http://www.power-commander-shop.com/130@ZU-RV01-A03/Rexxer-ECU-mapping-Rexxer-Aprilia-Mana-850.htm

With the mods above you should be able to get +65 hp on the rear wheel quite easily. The question is how much the belt can take...

I would also look into replacing the stock wheels since they are heavy and slows acceleration .

slowmike
06-11-2014, 09:40 AM
bump for Paul to see this.

David1948
06-13-2014, 12:37 PM
The the link below to the Power Commander draws a blank. I had a link saved to the same product but then it disappeared.

do you know of an alternative?



It's a fun idea but I'd make an educated guess that it wouldn't be very good value for money.

The genius about the mana is the transmission which allows the engine to stay at peak power during the entire acceleration.

Big bore mods on the other hand tend to add bottom end grunt which is brilliant for normal bikes with gears, but on the mana all you really need is more top end power to go faster.

To improve the mana's engine performance I'd:

1. Have a really good pro do the inlet and outlet ports (I stress that he really must know what he's doing, too many rednecks out there with a drill who claim to be experts)

2. Look if you can find or have a more agressive cam made

3. Replace the exhaust of course

4. I had a look at the inlet on my own bike but it actually looks very well designed, don't think you'll gain much from an aftermarket filter

5. Get it set up on a dyno with one of these: http://www.power-commander-shop.com/130@ZU-RV01-A03/Rexxer-ECU-mapping-Rexxer-Aprilia-Mana-850.htm

With the mods above you should be able to get +65 hp on the rear wheel quite easily. The question is how much the belt can take...

I would also look into replacing the stock wheels since they are heavy and slows acceleration .