V Raptor 250 Modding

TastyRabbit · 08-27-2014, 07:55 AM

Hi,

I'd like to thanks Weldangrind for the help he gave me.

Here's some photos of my V Raptor 250 - I'll list the mods at the end.

At the start with the Air Filter gone and pod added

CDI added - 5 degree advance + Exhaust

Respray

Mod list -

EGR gone : Free
Pod Filter - Air Box gone : £7
ooRacing CDI - £50
Respray - Khaki Green Plasti Dip 3 cans: £35
Exhaust : £40

To Do -

Rejetting

Luckily the Manx weather held up for me to spray outside!!! A rare thing... Unfortunately I can't ride it at the moment with out the jetting - waiting on the postman.

Weldangrind · 08-27-2014, 10:55 AM

Sweet bike!

I failed to realize before that you have an OHC engine; that's worth another hp and a few more revs over the pushrod version. I'll be interested to hear your thoughts on the CDI, once you have the jetting sorted.

I really like that colour. Please let us know how Plastidip stands up to petrol.

I'm quite envious of V-Raptor owners. We don't get that bike where I live.

SpudRider · 08-27-2014, 01:57 PM

You did great! I especially like your paint job.

I am impressed with the quality of construction of your V-Raptor. I also wish we could get these motorcycles in the United States.

TastyRabbit · 08-27-2014, 02:16 PM

Thanks,

The jets arrived in the post today. I put the 110 jet in place.

The bike is fine up to the late throttle where it sort of hiccups and the power comes off. Is that because the mix is too rich?

I may phone the local garage and ask him to teach me how to tune the carb properly. I'll have to wait a few days though as the Manx GP on and loads of people are at the garage....

I don't really get the spark plug thing either... Mine is really black, which I think means rich, but I'm not sure which to change the Needle, the small jet or the main.

On the plus side I do feel like I've accomplished something though. Its much easier to work on than my BMW.

Weldangrind · 08-27-2014, 03:30 PM

Does it hiccup as if it's running out of fuel? If so, I'd say it needs a fatter jet, like a 112.5. I'm running a 112.5 on my 200cc bike, and it's 23cc smaller than yours.

If the plug is black after idling, you're not getting an idea of how it's running at WOT.

PLEASE take Manx GP pics for us! You live on holy ground, and we must live vicariously through you.

TastyRabbit · 08-27-2014, 05:27 PM

Its not the TT it's the Grand Prix, so its a little less exciting...

Once its over I can run my bike flat out on the road to get the max speed though. We don't have speed limits. It should make tuning easier.

Weldangrind · 08-28-2014, 10:44 AM

Indeed! I recommend a full throttle plug chop, to see what the fuel needs are at speed.

Dave_D · 08-28-2014, 10:48 AM

Wow that's a nice bike
I'm jelous lol

Dave

TastyRabbit · 08-29-2014, 03:18 PM

Hi again,

I've tried the following jets now - main

110 - small hiccups
116 - medium
120 large
104 - tiny hiccups

I think its too rich.... Is that possible after changing the air filter and exhaust!!! The plug is black on full throttle....

I have convinced myself the holes on the 102 stock is actually smaller than it reads.

Weldangrind · 08-30-2014, 03:40 AM

You could certainly drop the $40 USD and buy a Mikuni. Much easier to get jets for, and the jet system is logical.

When you say the plug is black on WOT, did you do an actual plug chop? Was it with a new plug?

Changing the air filter and exhaust to free-breathing parts would create a lean condition.

TastyRabbit · 08-30-2014, 05:12 AM

No I just clean it and take it out to check the color/

pete · 08-30-2014, 06:04 AM

pilot jet maybe the issue...
the pilot jet dosn't suddenly stop feeding
fuel when the needle & main jets start working
as most think...

the TTR250 is a prime eg...
they come with 2 jet combinations..
40/138 or 38/142 both combinations
surply that same amount of fuel at
full throttle the 40/138 is used in colder climates
to make starting / cold running better..

Weldangrind · 08-30-2014, 02:14 PM

Quote:

Originally Posted by TastyRabbit

No I just clean it and take it out to check the color/

Since you have access to roads with no speed limit, I recommend a WOT plug chop. It will give you a better idea of what's really happening.

TastyRabbit · 08-30-2014, 05:04 PM

I don't want to buy another Spark Plug. They don't have anymore in the shop. I'll have to order more online.

TastyRabbit · 08-31-2014, 12:39 PM

Plasti Dip doesn't like petrol.

08-27-2014, 07:55 AM	#1
TastyRabbit Join Date: Jul 2014 Location: Isle of Man Posts: 31	V Raptor 250 Modding Hi, I'd like to thanks Weldangrind for the help he gave me. Here's some photos of my V Raptor 250 - I'll list the mods at the end. At the start with the Air Filter gone and pod added CDI added - 5 degree advance + Exhaust Respray Mod list - EGR gone : Free Pod Filter - Air Box gone : £7 ooRacing CDI - £50 Respray - Khaki Green Plasti Dip 3 cans: £35 Exhaust : £40 To Do - Rejetting Luckily the Manx weather held up for me to spray outside!!! A rare thing... Unfortunately I can't ride it at the moment with out the jetting - waiting on the postman.
	0

08-27-2014, 10:55 AM	#2
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Sweet bike! I failed to realize before that you have an OHC engine; that's worth another hp and a few more revs over the pushrod version. I'll be interested to hear your thoughts on the CDI, once you have the jetting sorted. I really like that colour. Please let us know how Plastidip stands up to petrol. I'm quite envious of V-Raptor owners. We don't get that bike where I live. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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08-27-2014, 01:57 PM	#3
SpudRider Join Date: Jul 2008 Location: Idaho Posts: 25,054	You did great! I especially like your paint job. I am impressed with the quality of construction of your V-Raptor. I also wish we could get these motorcycles in the United States. __________________ Spud "Never argue with an idiot. He will drag you down to his level, and beat you with experience." Mark Twain 2015 Zongshen ZS250GY-3 (RX3) 2006 Zongshen ZS200GY-2 (Sierra 200) 2005 Honda XR650L 2004 Honda CRF250X 1998 Kawasaki KDX220 Mods made to my Zongshen ZS200GY-2: http://www.chinariders.net/showthread.php?t=6894
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08-27-2014, 03:30 PM	#5
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Does it hiccup as if it's running out of fuel? If so, I'd say it needs a fatter jet, like a 112.5. I'm running a 112.5 on my 200cc bike, and it's 23cc smaller than yours. If the plug is black after idling, you're not getting an idea of how it's running at WOT. PLEASE take Manx GP pics for us! You live on holy ground, and we must live vicariously through you. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

08-28-2014, 10:44 AM	#7
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	Indeed! I recommend a full throttle plug chop, to see what the fuel needs are at speed. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0

08-27-2014, 02:16 PM	#4
TastyRabbit Join Date: Jul 2014 Location: Isle of Man Posts: 31	Thanks, The jets arrived in the post today. I put the 110 jet in place. The bike is fine up to the late throttle where it sort of hiccups and the power comes off. Is that because the mix is too rich? I may phone the local garage and ask him to teach me how to tune the carb properly. I'll have to wait a few days though as the Manx GP on and loads of people are at the garage.... I don't really get the spark plug thing either... Mine is really black, which I think means rich, but I'm not sure which to change the Needle, the small jet or the main. On the plus side I do feel like I've accomplished something though. Its much easier to work on than my BMW.
	0

08-27-2014, 05:27 PM	#6
TastyRabbit Join Date: Jul 2014 Location: Isle of Man Posts: 31	Its not the TT it's the Grand Prix, so its a little less exciting... Once its over I can run my bike flat out on the road to get the max speed though. We don't have speed limits. It should make tuning easier.
	0

08-28-2014, 10:48 AM	#8
Dave_D Join Date: May 2014 Location: Vancouver Island BC Posts: 264	Wow that's a nice bike I'm jelous lol Dave
	0

08-29-2014, 03:18 PM	#9
TastyRabbit Join Date: Jul 2014 Location: Isle of Man Posts: 31	Hi again, I've tried the following jets now - main 110 - small hiccups 116 - medium 120 large 104 - tiny hiccups I think its too rich.... Is that possible after changing the air filter and exhaust!!! The plug is black on full throttle.... I have convinced myself the holes on the 102 stock is actually smaller than it reads.
	0

08-30-2014, 03:40 AM	#10
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	You could certainly drop the $40 USD and buy a Mikuni. Much easier to get jets for, and the jet system is logical. When you say the plug is black on WOT, did you do an actual plug chop? Was it with a new plug? Changing the air filter and exhaust to free-breathing parts would create a lean condition. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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08-30-2014, 05:12 AM	#11
TastyRabbit Join Date: Jul 2014 Location: Isle of Man Posts: 31	No I just clean it and take it out to check the color/
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08-30-2014, 06:04 AM	#12
pete Join Date: Jan 2012 Location: ChCh , NZ Posts: 2,261	pilot jet maybe the issue... the pilot jet dosn't suddenly stop feeding fuel when the needle & main jets start working as most think... the TTR250 is a prime eg... they come with 2 jet combinations.. 40/138 or 38/142 both combinations surply that same amount of fuel at full throttle the 40/138 is used in colder climates to make starting / cold running better.. __________________ 09 XT660R ... 06 TTR250 ... 80 Montesa H6 125 Enduro... 77 Montesa Cota 348 MRR "Malcom Rathnell Replica"... Current resto projects.. 81 Honda CT110... 80 Kawasaki KL250A1... 11 Husaburg TE125 enduro... "sold" along with another 31... Lifan 125 Pitbike.. "stolen" ... KIWI BIKER FORUM...... http://www.kiwibiker.co.nz/forums/content.php All the best offroad rides in NZ... http://www.remotemoto.com/ E-mail... xtpete1@gmail.com
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08-30-2014, 05:04 PM	#14
TastyRabbit Join Date: Jul 2014 Location: Isle of Man Posts: 31	I don't want to buy another Spark Plug. They don't have anymore in the shop. I'll have to order more online.
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08-31-2014, 12:39 PM	#15
TastyRabbit Join Date: Jul 2014 Location: Isle of Man Posts: 31	Plasti Dip doesn't like petrol.
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