 |
|
 |
|
|
| Author |
Message |
| shane p |
This post is not being displayed .
|
shane p
Derestricted Danger
Joined: 06 Nov 2010
Karma :  
|
|
| Back to top |
  |
You must be logged in to rate posts |
|
 |
| Nope. |
This post is not being displayed .
|
Nope.
World Chat Champion
Joined: 16 Feb 2011
Karma :  
|
 Posted: 17:30 - 27 Mar 2011  Post subject: Re: aprillia rally 50 help |
 |
|
| shane p wrote: | hi i have fitted a race exhaust,race air filter,and upjetted the carb and it was running fine but now i have fitted a 70cc big bore kit and it dont run very well it just dont want to go no where its right slow and keeps spluttering. does anybody know whats wrong |
Well first off, dont start messing around with stuff like this when you have no idea, all you do is burn money to get about 7mph more.
Second, Dump the Open air filter. There worthless. Fit the standard airbox back.
Third, what size carb are you running? What make of 70CC kit? Have you fitted an uprated Crank? What exhaust? What jet are you using? Have you changed the rollers and clutch springs? Give us more info!
Oh and I assume you have converted to Pre-Mix now youve fitted a 70 as the Oil pump wont provide enough oil for the 70 Kit, so what ratio are you using?
____________________
Former: Derbi GP1 50, Sachs XTC 125, Suzuki GSXR 400 GK73A, Kawasaki ZX7R, Suzuki DR250, Yamaha RD350
Current: 2011 Yamaha XT660Z Ténéré, 2003 Yamaha YZR-R1 5PW (In Build), 2009 Kawasaki ZZR1400 |
|
| Back to top |
  |
You must be logged in to rate posts |
|
|
| shane p |
This post is not being displayed .
|
shane p
Derestricted Danger
Joined: 06 Nov 2010
Karma :
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| Nope. |
This post is not being displayed .
|
Nope.
World Chat Champion
Joined: 16 Feb 2011
Karma :
|
| Posted: 21:43 - 27 Mar 2011 Post subject: |
|
|
| shane p wrote: | hi the jets size is 85, the big bore kit make is MINARELLI, i have not fitted and uprated crank,the exhaust has not got a make, carb is standerd, no i have not changed the clutch rollers but im an having then fitted tuesday,and i have not changed the cluch springs. and yes i am using pre mix oil. |
How can the exhaust not have a make? I assume from this that it is an Endy 'Power Pipe', They are terrible exhausts. On a two stroke the exhaust is very important (Size and shape of expansion chamber etc.) so you need to get a decent exhaust, I recommend a Yasuni Exhaust, there expensive but worth the money. You also need to make sure your exhaust is compatible with a 70cc kit and not make for a 50.
As I said before, put your standard airbox back on.
If the carb is a 12mm or something then its far too small to run the 70 kit, you need to buy something bigger. I suggest a mid range dellorto or a malossi carb.
Try increasing the jet size too, it might be fuel starvation, 85 sounds a bit small for a 70 kit.
With regards to the 70 kit, are you sure you fitted it right? Got the piston in the right way? Got the piston rings on properly?
____________________
Former: Derbi GP1 50, Sachs XTC 125, Suzuki GSXR 400 GK73A, Kawasaki ZX7R, Suzuki DR250, Yamaha RD350
Current: 2011 Yamaha XT660Z Ténéré, 2003 Yamaha YZR-R1 5PW (In Build), 2009 Kawasaki ZZR1400 |
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| Avora |
This post is not being displayed .
|
Avora
Renault 5 Driver
Joined: 08 Feb 2009
Karma : 
|
| Posted: 17:31 - 28 Mar 2011 Post subject: |
|
|
There are so many things this could be...but start with the carb, to do that, check the colour of the plug. Running on premix leans it out big time. But dont guess at the sizes of the jets, my tgb shed took a 70 main jet with a 70cc "bore" kit, and an endy powerpipe on premix. Each engine is different. That was a small carb though, with standard airbox. The right piston is important, my first attempt meant I had a low compression piston in it, would only do 40mph flat out, till the circlip jumped out and destroyed the cylinder and piston. For a ped, I'd just stop with what you have done, and sort out the carb (I presume this is the issue)
On an aside I dont agree the Endy exhausts are rubbish, they are perfect for cost effective replacement, dont think mine can be Mot'd with it though. Meh, its sat in the garage with no carb since July. Yasuni are proper performance all out design, and not anything I would consider for a ped, unless it was going to be raced seriously.
____________________
Kawasaki AR125 B8 - Getting ready for a summer time soon! |
|
| Back to top |
| |
You must be logged in to rate posts |
|
 |
Old Thread Alert!
The last post was made 14 years, 57 days ago. Instead of replying here, would creating a new thread be more useful? |
 |
|
|
This page may contain affiliate links, which means we may earn a small commission if a visitor clicks through and makes a purchase. By clicking on an affiliate link, you accept that third-party cookies will be set.
|
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum
|
Read the Terms of Use! - Powered by phpBB © phpBB Group
Debug Mode: ON - Server: birks (www) - Page Generation Time: 0.07 Sec - Server Load: 0.58 - MySQL Queries: 13 - Page Size: 46.16 Kb
|
Help & FAQs
Search BCF
Members
Groups
Events Calendar
rating
rating