Mitaka Barrel and piston..

[bmwsport]

Guys,

What do you think of this? good price?

Ebay Link

Any feedback on the quality of these parts? I've used the search thing and found a relevent post but was back in '05...

Thanks.

[BenR]

No idea what their barrels are like but prox, wiseco or asso werke pistons are supposed to be better.
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Current bikes: suzuki RG125UN wolf. Yamaha MT-07

[Kickstart]

Hi

Not a bad price. Sometimes seen them cheaper, but not by much (think £180 is the cheapest I have seen them).

Think the pistons are meant to be OK although some say to use them with better rings.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[tutton]

Everyone ive asked in the 2stroke reliablility stakes say keep away from mikita. cheap copy parts.

Mines recently blew its piston and barrell, im going to get the real one replated, and then a Pro-X piston.
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[bmwsport]

Interesting.. thanks guys.

I had a look at the pro-x piston.. this Wiseco one looks pretty awesome..

https://cgi.ebay.co.uk/Aprilia-AF1-RS125-RS-125-85-05-54mm-Wiseco-Piston_W0QQitemZ290305436896QQcmdZViewItemQQptZUK_Motorcycle_Parts?hash=item43978d6ce0&_trksid=p3286.c0.m14&_trkparms=65%3A12%7C66%3A2%7C39%3A1%7C72%3A1689%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50

Just a few quid mind.. lol

[spitfire123]

[Blau Zedong]

[ms51ves3]

[Slightly Off Topic]

Mitaka Piston kits in an RD250E air cooled. Good or bad?

[/Slightly Off Topic]

[bmwsport]

[tutton]

[Blau Zedong]

I'd beleive both Stan Stephens and PJME who have supplied Mitaka piston kits as a matter of course with any rebore work I've requested. Mitaka rings are superb - you can tie them in knots without them snapping whereas cheap Taiwanese shit shatter with the slightest twist.
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18:54:48 Rob Fzs: jews don't give away stuff for free

18:54:59 Rob Fzs: unless its their clothes/ hair/ golden teeth

[tutton]

Funny, PJME told me to go for replating the original barrell over a mikita kit
Meh this is beyond the point ill be going Pro-x piston and rings, which is apprarently as good as oem.
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[bmwsport]

Options options.. i think mines going to require a replate and repair if i went that route as i have a scored piston.. which i presume with have scored the barrell too (i can only see the piston by looking up the exhaust port) A new barrell altogther in the shape of the mitaka is quite appealing.. but i would prefer to keep the genuine part i think.

Is that Wiseco piston going to be much better than the pro-x? i presume the wiseco is the only one out of the 3 (mitaka/pro-x) thats forged? does this make much difference?

[tutton]

https://www.pjme.co.uk/acatalog/Aprilia_RS125_Engine_Top_End_.html

PJME top end page answers your questions.
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[bmwsport]

Thanks tutton, although that doesn't explain why.. looks a good site though.. i'd be tempted by the single piston ring Wiseco flat top piston with the Mitaka barrel and the vhm flat cylinder head as it all looks very good lol, but doesn't expain the benefits? Hadn't seen those cylinder heads until now..

[tutton]

Your going into tuning now, doing the cylinder head and that you do know that right?
Single ring pistons have less friction asfaik,
less friction = better for the engine thus should be a little faster, although you will probably sacrafice some reliability for running a racing head and piston.
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Past: '05 Peugeot XPS '99 Aprillia RS125 '94 FZR600R
Current: '02 ZX636 A1P '51 CCM R30

[bmwsport]

Yea.. i didnt realise there was such tuning stuff about

Just had a look at stan stephens site.. his cylinder heads and engine work look/sound awesome..

Would be the right time to do some tuning as it needs the top end doing anyway.. wheres that credit card lol, i'd love to have a go on one with a fully sorted engine, i'd expect theres quite a difference?

[Kickstart]

Hi

When PJME rebored the TZR barrels for me they supplied them back with Mitaka pistons (although with alternative rings).

As far as I know forged pistons need a slightly different clearance to normal cast pistons.

All the best

Keith
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Traxpics, track day and racing photographs - Bimota Forum - Bike performance / thrust graphs for choosing gearing

[5v3d3b0]

My mitaka cylinder kit ran perfect for about a year (just sold the bike)
That includes me doing about a mile on ZERO 2t oil!
No questions, stupid mistake...
I think it's a good head, and with flat head piston and all the shit you can put on if you want to like V force carbon reed block and a 34 carb, I expect you can see quite a difference..

[Coxyzxr]

[blutonium92]

never heard much about them tbh,
id stick to MK
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Now - Ducati 748, Laverda 650 Sport
Had- 56 Aprilia RS50, 03 Aprilia RS50, Hond VFR 400 NC30, Aprilia RS250, Suzuki SV650

[Fnatic]

My current bike has had a full rebuild already and it's now on 10,000 km overall. My RS has that Mitaka kit. It seems fine but I'll probably put a better brand on it when it next goes.