The JEM Jr is the budget-friendly entry into Steve Vai's signature line, keeping the monkey grip handle and Vai-inspired looks without the Prestige-level price tag.
12 mods reviewed: 3 drop-in, 7 need verification, 1 needs modification, 1 not compatible.
Places we know sell the Ibanez JEM Jr (Steve Vai).
Andertons
We may earn a commission if you buy through links on this page. It doesn't change the price you pay. How we make money
The JEM Jr is the budget-friendly entry into Steve Vai's signature line, keeping the monkey grip handle and Vai-inspired looks without the Prestige-level price tag. Real-world teardowns and parts listings confirm this uses a genuine Ibanez Lo-Pro Edge double-locking tremolo, the same core system used on higher JEM models, not a cut-down substitute, though Ibanez has built several non-interchangeable variants over the years (Edge, Edge Pro, Edge III, Edge Zero, Edge Zero II) and a generic licensed Floyd Rose will not share this bridge's cavity routing.
Tailpiece
None (bridge-integrated, locking trem)
Scale length
25.5" (648mm)
Tuner hole size
10mm (25/64")
Nut width
43mm (1.693")
Not published by Ibanez: string spacing and bridge mounting spacing. Measure these before buying a bridge.
The genuine factory tremolo for this exact guitar, sold as a direct replacement unit.
Real-world listings and teardowns confirm this guitar ships with a genuine Ibanez Lo-Pro Edge, matching this exact factory assembly directly.
Fits the standard humbucker route this guitar's stock neck and bridge pickups already sit in. You will need to solder it in.
Fits the standard humbucker route this guitar's stock neck and bridge humbuckers already sit in.
£309.99 at Andertons
View at AndertonsFits the standard humbucker route this guitar's stock neck and bridge pickups already sit in. You will need to solder it in.
Fits the standard humbucker route this guitar's stock neck and bridge humbuckers already sit in.
£129.99 at Andertons
View at Andertons
Commonly reported to fit this guitar's middle pickup mounting, though not officially confirmed. Worth checking before ordering.
A widely used player guide reports Stratocaster-style staggered single-coils fit physically into similarly routed middle-position slots, though not manufacturer-confirmed as an exact mounting match for this guitar's specific middle pickup.
Help confirm this fit
£104.99 at Andertons
View at Andertons
Hole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up.
Ibanez pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
See current price at Amazon
View at AmazonHole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up.
Ibanez pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
See current price at Amazon
View at AmazonHole size should match, but this guitar has a pointed reverse headstock. Confirm the correct InvisoMatch plate variant before ordering.
Ibanez pointed reverse headstock, screw hole alignment not guaranteed even with an adapter plate unless the correct variant is used.
Help confirm this fit
See current price at Amazon
View at AmazonHole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up with the factory ones. Worth checking before ordering.
Ibanez pointed reverse headstock. Owner reports on this headstock style describe aftermarket tuner screw holes not lining up with factory pilot holes even when post diameter matches.
Help confirm this fit
See current price at Amazon
View at AmazonHole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up.
Ibanez pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
See current price at Reverb
View at ReverbHole size should match, but this guitar has a pointed reverse headstock where aftermarket tuner screw holes sometimes do not line up.
Ibanez pointed reverse headstock, screw hole alignment not guaranteed.
Help confirm this fit
This tuner is sized for vintage tuner holes, not the modern holes on this guitar. You'll need Gotoh's conversion bushings, sold separately, to fit it.
This tuner is vintage-hole spec (8.73 to 8.8mm), not the modern 10mm hole this guitar actually has. Gotoh sells conversion bushings separately for exactly this situation. Not a direct swap, but not a drilling job either, it is a bushing change.
Help confirm this fit
If you have fitted any of these to this Ibanez JEM Jr (Steve Vai), tell us what you found and we'll update the data.
