Search found 188 matches

Go to advanced search

by mezzer
Sat Oct 31, 2020 5:33 pm
Forum: R1 98-99 4XV
Topic: Ever seen a 4XV programmable ECU I have one and need help
Replies: 8
Views: 1301

Re: Ever seen a 4XV programmable ECU I have one and need help

Darren at melted sliders is good with setting up ignitech stuff
by mezzer
Sat Oct 31, 2020 11:49 am
Forum: R1 00-01 5JJ
Topic: Cylinder head skimming
Replies: 4
Views: 3338

Re: Cylinder head skimming

Ideally you need to measure squish and piston to valve clearance and go from there... how do you know the head or top of barrels havnt already been …login to view the rest of this post
by mezzer
Sat Oct 31, 2020 11:44 am
Forum: R1 98-99 4XV
Topic: Ever seen a 4XV programmable ECU I have one and need help
Replies: 8
Views: 1301

Re: Ever seen a 4XV programmable ECU I have one and need help

Thats an ignitech ignition... had one on my race bike. Very good piece of kit
by mezzer
Thu Oct 05, 2017 3:49 pm
Forum: R1 98-99 4XV
Topic: 675 Front End
Replies: 9
Views: 1515

Re: 675 Front End

I've got some 6 pot calipers, currently stripped and ready for rebuild.
I've been using the original blue spots and I have to say they are very good,…login to view the rest of this post
by mezzer
Tue Oct 03, 2017 8:31 pm
Forum: R1 98-99 4XV
Topic: Air leak on my 4xv
Replies: 12
Views: 1851

Re: Air leak on my 4xv

Sounds more like low compression to me and carbs have been adjusted to get it running ok-ish. As already mentioned get a compression test or leak-down…login to view the rest of this post
by mezzer
Thu Aug 24, 2017 12:24 am
Forum: R1 Specific
Topic: Will a 4xv or 5jj flywheel work on 5pw
Replies: 1
Views: 1566

Re: Will a 4xv or 5jj flywheel work on 5pw

If the prefix is different then the part is different!

I guess the rotor/stator assembly is different on 5pw's due to the fuel injection, fuel pump e…login to view the rest of this post
by mezzer
Sun Jul 30, 2017 12:52 pm
Forum: R1 02-03 5PW
Topic: ram air box
Replies: 7
Views: 1637

Re: ram air box

benocehcap wrote:Check out QB for the air box...
Don't think qb do an airbox for the 5pw
by mezzer
Sun Jul 09, 2017 11:45 pm
Forum: R1 98-99 4XV
Topic: Adjusting valve clearances
Replies: 7
Views: 1348

Re: Adjusting valve clearances

As already said it's impossible to say what shim sizes are required unless you know what shims are already in the bike, then you can calculate what yo…login to view the rest of this post
by mezzer
Fri Jul 07, 2017 10:33 pm
Forum: R1 00-01 5JJ
Topic: Piston Ring Kit
Replies: 38
Views: 3005

Re: Piston Ring Kit

Moise wrote:
If the bore expands, then the cracks should close up if anything.
Sorry I disagree with you there, if the bore diameter increases, as …login to view the rest of this post
by mezzer
Fri Jul 07, 2017 9:42 pm
Forum: R1 00-01 5JJ
Topic: Piston Ring Kit
Replies: 38
Views: 3005

Re: Piston Ring Kit

jompy wrote: And there's loads of dodgy twats selling off crap engines !
Very true!!!
by mezzer
Fri Jul 07, 2017 9:18 pm
Forum: R1 00-01 5JJ
Topic: Piston Ring Kit
Replies: 38
Views: 3005

Re: Piston Ring Kit

It is the cause of the hot start issue, even if you put new rings in how would they seal on the crack?


I'm not so sure. The rings don't reach the cra…login to view the rest of this post
by mezzer
Fri Jul 07, 2017 8:24 pm
Forum: R1 00-01 5JJ
Topic: Piston Ring Kit
Replies: 38
Views: 3005

Re: Piston Ring Kit

Gutted for you, I was hoping it wasn't the bores but I've seen it before with these engines.

It is the cause of the hot start issue, even if you put ne…login to view the rest of this post
by mezzer
Fri Jul 07, 2017 8:14 pm
Forum: R1 98-99 4XV
Topic: Oil level switch?????
Replies: 20
Views: 1431

Re: Oil level switch?????

Try putting in a little more oil but do not overfill!!!!

Fill sight glass to 3/4 full when bikes upright and see how it is.

Turning the bike off the…login to view the rest of this post
by mezzer
Tue Jul 04, 2017 10:57 am
Forum: R1 00-01 5JJ
Topic: doesnt want to start when hot
Replies: 17
Views: 2283

Re: doesnt want to start when hot

Sloppy2ndGear wrote:
mezzer wrote:
Sloppy2ndGear wrote:BLOODY PISTON RINGS
Have you stripped the engine and checked the bores?
Engine is out. Just got
…login to view the rest of this post
by mezzer
Thu Jun 29, 2017 8:39 pm
Forum: R1 98-99 4XV
Topic: Air jets
Replies: 14
Views: 1445

Re: Air jets

Personally I'd go for the 5jj carbs as I've found they have better midrange than the earlier 98's

What is the difference between 4xv and 5jj carbs?

C…login to view the rest of this post
by mezzer
Thu Jun 29, 2017 8:06 pm
Forum: R1 00-01 5JJ
Topic: doesnt want to start when hot
Replies: 17
Views: 2283

Re: doesnt want to start when hot

Sloppy2ndGear wrote:BLOODY PISTON RINGS
Have you stripped the engine and checked the bores?
by mezzer
Thu Jun 29, 2017 8:05 pm
Forum: R1 98-99 4XV
Topic: Air jets
Replies: 14
Views: 1445

Re: Air jets

Personally I'd go for the 5jj carbs as I've found they have better midrange than the earlier 98's

What is the difference between 4xv and 5jj carbs?

C…login to view the rest of this post
by mezzer
Tue Jun 27, 2017 7:24 pm
Forum: R1 98-99 4XV
Topic: Air jets
Replies: 14
Views: 1445

Re: Air jets

The jets which cannot be removed are air corrector jets, they need blocking off to fuel right with qb Carbon airbox.

God knows why the pilot air jets…login to view the rest of this post
by mezzer
Mon Apr 10, 2017 12:05 am
Forum: R1 98-99 4XV
Topic: Starting woes...Not firing on all cylinders
Replies: 14
Views: 1720

Re: Starting woes...Not firing on all cylinders

If it only runs with choke that suggests it's running lean at idle?

I would be checking the pilot jets, they block easily.

When you get the bike r…login to view the rest of this post
by mezzer
Sat Mar 25, 2017 9:01 pm
Forum: R1 98-99 4XV
Topic: Possible stupid question alert
Replies: 3
Views: 985

Re: Possible stupid question alert

If different part numbers are displayed for left and right rears then they are different parts
by mezzer
Fri Feb 24, 2017 7:51 pm
Forum: R1 00-01 5JJ
Topic: New bore lining
Replies: 15
Views: 2187

Re: New bore lining

Steve5jj wrote:Yes using the bigger pistons on mine for more power it's a race motor, the 4xV pistons will work too depends what your after.
Who is d…login to view the rest of this post
by mezzer
Wed Jan 25, 2017 9:30 pm
Forum: R1 98-99 4XV
Topic: 4xv fork oil and springs
Replies: 44
Views: 2499

Re: 4xv fork oil and springs

I found a video by Dave Moss on how to change the oil without removing the spring. I'll do that, see how the damping is, then decide what to do next.…login to view the rest of this post
by mezzer
Mon Jan 23, 2017 8:27 pm
Forum: R1 98-99 4XV
Topic: 4xv fork oil and springs
Replies: 44
Views: 2499

Re: 4xv fork oil and springs

Here is how I compressed the springs :lol:, they had a large spacer for more pre-load so were difficult to compress!

Image…login to view the rest of this post
by mezzer
Wed Jan 11, 2017 1:32 am
Forum: R1 98-99 4XV
Topic: Rear wheel bearing
Replies: 41
Views: 3101

Re: Rear wheel bearing

In the UK the original 4xv wheel bearing part # 93306-20567 has been superseded by the part # 93306-07806, which is the part number for a 5jj.

What …login to view the rest of this post
by mezzer
Sun Jan 08, 2017 4:18 pm
Forum: Projects
Topic: The R4 (ridiculously slow project)
Replies: 77
Views: 16359

Re: The R4 (ridiculously slow project)

Some very nice engineering work there!!!

Quick question... why go with an electric water pump?

Go to advanced search